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Showing content with the highest reputation since 20/10/18 in Posts

  1. 57 points
    Imaged with my AG12 and H35. A massive task to tame Alnitak, it took over 12hours to process this one. Exposure times were 4x900s in H-alpha, 4x900s in Red, 4x820s in Blue and 4x640s in Green. Processed in Photoshop and Lightroom. Comments welcome thanks for looking
  2. 49 points
    First time I have a proper go at some astro with my nifty fifty lens. Canon 600d full spectrum, ISO800, 50mm f1.8 lens stopped at f4, 10x600sec guided on my eq3 pro mount. I love how it came out.
  3. 43 points
    First one of the year, folks. We've had a cracking run of skies and I did this over the last four nights in what's now the single Tak 106, since Tom's camera has moved next door to his new robotic shed. Mesu 200/Atik 11000/Baader filters. Luminance 20x15mns, RGB 9x10mns per colour, Ha 13x20 mns. Total just short of 14 hours. This target is beset by challenges. There is a veritable air display of satellites in this region, each sub copping four or five. Then there were off shot flares blazing across two parts of the image. We had great seeing for the first two nights but then set two new world records for bad seeing after that. Never seen anything like it. FWHM went from 0.88 on night 2 to 2.3 on night 3! Fortunately I got the L on the first two nights so soft colour wasn't too hard to deal with and there is no fine detail in the Ha. (The Ha gives the image a real lift but is incredibly faint. Had anyone seen what I had to do to get it into the image they'd have notified the Police.) Anyway, enough excuses. Here she is... Olly
  4. 40 points
    Well, I couldn't find another image of NGC4157 on SGL so it's obviously not that popular a target ! The galaxy is located in Ursa Major about 56million light years from Earth and is approximately the same size as our own Milky Way. It is receding from us at 774 km/s. From Earth you see it almost edge on, however, a little of the core detail is visible. Three supernova explosions have been recorded in this galaxy. Processing this galaxy was less than straightforward due to the fact that it has a low surface brightness but it is also surrounded by bright blue stars. The LRGB image below represents 14.5 hours integration time and was taken with my Esprit 150. I've also attached an annotated version for the background galaxy fuzzy hunters. I hope you like it ! Alan LIGHTS: L:29, R:20, G:19, B:19 x 600s, DARKS:30. FLATS:40 all at -20C.
  5. 39 points
    Finally, half a clear night and I had my second chance to learn to master the Mesu mount. Put the Esprit 150 on it with the ASI 071MC at the camera end (gain 200, offset 30, -15°C). After a bit of fighting with the software running the mount (I thought I remembered how to do it but had finally to read the manual again), I started imaging at 21.30. At midnight clouds moved in so I only got 2.4 hours of data (29 x 5 min). Still, I caught a lot of galaxies, the three larger ones being NGC 4725, 4712 and 4747. Seeing was probably relatively poor since I was far from the Mesu guiding curves people post. Mine was around 1.0" RMS. Stacked and annotated in PI, processed in PS. It may be clear on Monday night and my plan right now is to collect lum using the Esprit 150 with a 0.79x TS reducer (so f/5.5) and my ASI 1600MM. Will give a very similar FOV and pixel scale. Comments and suggestions wecome of course!
  6. 38 points
    SkyEyE Observatory Ts130 f6.6 +reducer G3_16200 Frames: R 24x300" G 24x300" L 75x300" R 25x300"
  7. 33 points
    Rogelio Bernal Andreo pointed this one out: patches of dust near the Black Eye Galaxy (M64). I found this one quite difficult to process and I'm still not sure if I'm happy with the colours... There's a large difference in brightness between M64 and the lane of dust. Usually I try to keep away from local brightness adjustments, but this time I had to process M64 separately, because otherwise it would be completely overexposed. Captured last weekend from Grandpré (Ardennes, Northern France). Total integration time of 5 hours and 40 minutes. 5 minutes subs @ ISO 400. Takahashi Epsilon-180ED and Nikon D810a.
  8. 33 points
    Hello everybody, the requested M31 mosaic is ready Details: http://www.spaceimages.de/en/astrophotos/galaxies/m-31-mosaic or https://www.astrobin.com/378147/ Best viewed in full resolution. I hoppe you like it. Jens
  9. 32 points
    The Orion Nebula Last night observation of Orion Nebula. DAY: Saturday DATE: 23/2/19 TIME: 21:00 SCOPE: Dob 10px Sky-Watcher F.L.1200/f4.7 EYEPIECE: 24mm Explore Scientific F.O.V. 68° LOCATION:Mammari Thanks for looking
  10. 32 points
    Greetings! Today I will be sharing with you all, the coolest galaxy in the night sky: Messier 51- The Whirlpool Galaxy. I gathered a total of 17 hours of data (14hrs Lum, 3hrs RGB) under bortle 4.5 skies. This was a very quick process with the RGB but the color turned out exactly as I wanted it to. I may re process this again but I’m extremely happy with these results! This wasn’t supposed to be a project until late March or April but I just couldn’t help myself?. Hope you all enjoy one of our galactic neighbors Equipment: Astro-Tech 8rc (.82pix/") CEM60 gem Atik 414ex monochrome ccd QHY5L-ii autoguider Astrodon LRGB
  11. 31 points
    My first attempt at NGC1333, which is a reflection nebula in the constellation Perseus. There's quite a lot going on in the LRGB image below which represents just over 14 hours integration time and was taken with my Esprit 150: a blue reflection nebula, dark dusty lanes and intense areas of star formation. These latter regions contain an impressive collection of Herbig Haro objects which are formed when narrow bands of very rapidly moving partially ionized gas, ejected by the proto stars, collide with by nearby gas and dust. I decided to run my customized Pixinsight annotation script over the image which revealed that it contains over 20 HH objects, given that about 500 have been discovered, this seemed quite a catch ! Alan LIGHTS: L: 38, R:15, G:15, B: 19 x 600s, FLATS:40, BIAS:100, DARKS:30 all at -20C.
  12. 30 points
    The Headphones Nebula This project has tested me beyond all imagination. With much help from folk on here, I finally managed to get the EdgeHD 8" collimated, back spaced and functioning as well as possible. The weather has done everything it can to scupper me - I had a small snowy flood in the observatory and the QSI doesn't seem to like very cold ambient temperatures. Processing of the data has been a huge challenge. I have a fair bit of data, but this target is extremely faint, so I just don't have enough data to combat the noise. The image reminds me slightly of an impressionist painting, but hey, they can be quite nice! The target itself is an old planetary nebula some 1,600 light years away in the constellation of Lynx. It has the catalogue numbers of Jones-Emberson 1 and PK 164+31.1. It is only magnitude +14 or +15, sources vary, and given that it stretches across about 3 light years, it has a very low surface brightness. This thing is faint! The white dwarf star that remains after the explosion that created this nebula is clearly visible in the centre of the nebula and is extremely blue, almost turquoise, shining at just magnitude +17. Is this the ultimate fate of our own Sun? Something like this anyway and we certainly won't be around to witness it... by we I mean humanity! Technical Details Celestron EdgeHD 8" with 0.7x Reducer, QSI 683-WSG8, Astrodon 31mm filters, Mesu 200. Ha = 18 x 1800s OIII = 20 x 1800s RGB = 24 x 300s each TOTAL = 25 hours I could have done with a load more data really given how faint the target is and how slow my SCT is, but the Sky Gods have decided otherwise. It doesn't look like there will be any good imaging nights before the Moon comes back, so that is it for this project for now. I have done my best with the data I collected and am happy to let this one go now. I can't face any more time trying to tweak this and desperately trying to stop it being noisy. Damn headphones... Hope you like it and please do let me know what you think. Clear skies!
  13. 30 points
    My prayers and sacrifices to the Sky Gods were heard and answered - a window of clarity opened at around midnight last night and while the seeing was atrocious, I had to have a go at imaging 46P as it slipped past the Pleiades. This image consists of 75 x 60s with a Canon EOS 1Dx and 70-200mm lens at 200mm, ISO800, f2.8, tracked with a Star Adventurer. Shot between 00:19 and 01:37. I'm delighted to have got something of this part of 46P's journey, but I need to work on my comet / stars background DSS processing techniques as there is still a bit of streaking around the comet from the DSS stack. Anyway, I'm very happy to have been given the chance at this one.
  14. 30 points
    Located in the constellation of Pegasus and about 50m light years distant is the 11th magnitude ring galaxy NGC7217. Simulations indicate that the formation can be explained by the collision of a two galaxies: a compact galaxy with a larger spiral. However, today, it has no nearby companions and appears to float isolated in space. The LRGB image was taken with my Esprit 150 and represents just over 11 hours integration time. Alan LIGHTS: L: 26,R:13,G:11, B:17 x 600s. DARKS:30, FLATS:40, BIAS:100 all at -20C.
  15. 29 points
    Like the lunatic that I am, I decided to get the scope out last week during that storm that was passing through. The skies were clear and there was no moon about, so I figured why not! Only problem was the 17-20 mph winds, lol. I got 2 hrs of subs but had to throw away half of them due to guiding problems more so than the wind, amazingly. This was the 2nd time in a row i'd had Dec guiding problems, and that's after about 2 years of not having a single problem guiding. After the 1st hr of wasted subs, I turned off Fast Switching in Dec and chose to only Dither in RA, and the Dec problems mostly went away, at least to allow me to capture 1 hr of 'still dodgy but just about useable' subs. Once M42 disappeared behind the neighbour's roof, I then re-calibrated on the Celestial Equator (Dec 0) and when I switched to the Pinwheel Galaxy I was able to guide as normal again (with Fast Switching and Dithering in both RA and Dec both turned on again) and didn't lose any subs, despite the wind, so I've decided that from now on I won't be calibrating at the target itself, i'm always going to do it at Dec 0. I decided to throw this in with another 1 hr of subs (plus 10 x 30s for the core) that I took back in Jan 2017 (has it really been that long?!). That hr also had issues, with some weird streaking in the lower left that I could never work out what caused it. The D5300 hadn't been modified at that stage either. So I fired it all in to APP and decided to stack it anyway, and give it a quick process. Then chose to crank it up to 11 on the colour front, just for laughs. It won't be going on the wall anytime soon, lol, but I suppose it came out a bit better than I was expecting, all things considered. 20 x 360s with an IDAS-D1 D5300, 80ED, HEQ5-Pro. Stacked in APP, processed in PS. CS! edit - I forgot to downscale it - so no pixel peeping allowed ?
  16. 29 points
    Ive wanted to get a nice rendition of Orion for ages but its one I always overlook as sky time is very precious in the UK and there is always something else to get. Its got to be the most imaged target in the sky but is it easy....I dont think so. The colour and tonal range is massive making it a huge task to process. It took me around 12hours to process this one. Imaged in one night with my AG12 F3.8 Newt and Starlight Xpress H35, conditions were variable with light haze hindering the session, but to be honest I'll take what I can. We have had another very poor winter season with partial clear skies and rain as most of you already know. Exposure times were. 4x900 Ha 1x900 in R 4x840 in B 4x620 in G. Core exposures in RGB were 30s. Managed to increase the red signal with the H-alpha frames. Not Ideal but it is what it is! Calibrated with DSS, processed in Photoshop CS3 and Lightroom. thanks for looking
  17. 29 points
    From Wikipedia: "The Cone Nebula is an H II region in the constellation of Monoceros. It was discovered by William Herschel on December 26, 1785, at which time he designated it H V.27. The nebula is located about 830 parsecs or 2,700 light-years away from Earth. The Cone Nebula forms part of the nebulosity surrounding the Christmas Tree Cluster. The designation of NGC 2264 in the New General Catalogue refers to both objects and not the nebula alone. The diffuse Cone Nebula, so named because of its apparent shape, lies in the southern part of NGC 2264, the northern part being the magnitude-3.9 Christmas Tree Cluster. It is in the northern part of Monoceros, just north of the midpoint of a line from Procyon to Betelgeuse. The cone's shape comes from a dark absorption nebula consisting of cold molecular hydrogen and dust in front of a faint emission nebula containing hydrogen ionized by S Monocerotis, the brightest star of NGC 2264. The faint nebula is approximately seven light-years long (with an apparent length of 10 arcminutes), and is 2,700 light-years away from Earth." This image has been a delight to process and much simpler than my last image of the 4 panel mosaaic of IC59-63. I do particularly enjoy the wonderful 'texture' of the Fox Fur and the delicate blushing orange/yellow reflection nebula seemingly floating above the Cone. The bright blue stars of course needed some taming and careful care when combining the Ha to avoid excessive ringing. Details: TEC140 10 Micron GM2000HPS II UP QSI690wsg-8 Astrodon filters Ha (3nm) 23 x 1200s; Lum 48 x 600s; R 26 x 600s; G 24 x 600s; B 24 x 600s Total integartion 28 hours Data acquisition: Barry Wilson & Steve Milne at our shared remote rig e-Eye, Spain. Processing: Barry Wilson using PI, capture SGP. Thanks for looking & CS!
  18. 26 points
    Sinus Iridum is an impact crater filled with lava that lies northwest of Mare Imbrium. It is far from any landing site of the Apollo missions, the nearest (Apollo 15) is over 1000 km away. Scientists would like to take a look at basaltic chemistry to see how much they differ from the basalt samples collected at the Apollo 15 mission. Wrinkled ridges cross the bed, and in some places there are families of rocks stacked on the ridges of these crests. Where are these rocks coming from? From the mountain range? Many small irregularly shaped craters punctuate Sinus Iridum, how were they formed? Over the past four decades, the Moon has suffered an almost total abandonment, fortunately, in recent years, the Chinese are committed to taking this delay. Many unanswered questions, which perhaps the Yutu rover (Jade Rabit), who landed on Sinus Iridum may come to answer. This impact basin, approximately 100 km in diameter, was filled by at least 4 basaltic spills. On its "banks" there is a semicircular ring of dramatic mountains called the Jura Mountains, with the Heraclides Promontory at its far west and the Laplace Promontory at its eastern end, these promontories, which can be seen with perfection in this picture. From a closer look at the exact point on which the plains meet, look closely at the promontory of Laplace and its intriguing geology. Imagine yourself at the top at an altitude of 2600 meters observing the plain around you! Did you feel a chill? https://www.astrobin.com/full/392089/0/?nc=astroavani
  19. 26 points
    Hi folks, I was having a go at some HA imaging of the California Nebula (NGC 1499) last night, but only managed 5 x 15 minute subs before the clouds rolled in. However, I stacked the images anyway, and noticed that slap-bang in the middle was a bright asteroid trail. Being a huge fan of asteroid tracking, it's odd that I didn't know it was there beforehand. It turns out that it's Asteroid (584) Semiramis, a 27km-wide object discovered in 1906 which is currently as bright as mag 10.8. It won't be this bright again for a few years. Atik 428ex, HA filter, 200mm f/5 Newtonian, 5 x 900s exposures, Off-axis guiding with a QHY5-ii. A bit noisy due to the lack of subs or calibration files. And here's an animation of the 5 images, warts 'n all:
  20. 25 points
    A surprise clear sky tonight pursuaded me to get the 12 inch dob set up. Wispy cloud now and then but the impromptu session delivered some good galaxy viewing in the Coma / Virgo area and also Ursa Major, Ursa Minor and Draco. Nice run down (or is it up ?) the Markarian's Chain with 11 galaxies showing then headed up for the Black Eye Galaxy and others in Coma B. Back to the fringes of our own galaxy for the Messier 3 globular cluster (Messier's first actual discovery apparently). On to Ursa Major practically overhead so M51 was showing two strong cores and more than a hint of spiral structure. M101 also showing well as a large somewhat unevenly illuminated patch with hints of a knotty structure. Ursa Minor and Draco revealed more galaxies (didn't note which I'm ashamed to say) but the Cat's Eye Nebula looked very bright and sharply defined with it's central star gleaming. Hercules had cleared the conifers so M13 and M92 globulars could not be ignored. Both looking wonderful at 199x and 265x - close to their photographic images with the 12 inches of aperture. Backing off the magnification a little to catch galaxy NGC 6207 in the same field of view as M13. Finished the session with the good old Ring Nebula as Lyra moved out of the Bristol skyglow and finally a Summer favourite - Albireo in Cygnus, with strongly contrasting coloured stars despite it's relatively low altitude. Post-session Googling found this very recent Sky & Telescope piece on the Markarian's Chain which might be helpful for those who wish to explore this rich area of the sky - and now is the time to do that ! https://www.skyandtelescope.com/observing/yanking-markarians-chain/
  21. 24 points
    I guess I would be totally out of imaging at the moment if I didn´t have my 3 nm Astrodon Ha-filter. First clear nights in over 2 months and of course that darn evil orb is up there, bright as ever! ? Managed to get a total of 76*5 minutes and I guess this is about as good as I can get it considering the full moon. Really can´t wait to get my hands on some O3 and S2 data for this one now! Oh, if only I could afford Astrodons for those as well... The field of view of my Sigma 500mm lens really fits this target! Thanks for watching, hope you like it ? Gear used: ZWO ASI1600MM-Cool @-20C Astrodon 3nm Ha filter Sigma 500/4,5 EX DG HSM tele lens ZWO EF lens adapter ZWO EFW-8 filter wheel Orion Magnificent Mini Autoguider Skywatcher HEQ5 Pro Synscan
  22. 23 points
    Last weekend I went on a trip to a UK bortle 2 location and because I wanted the Blue Horsehead Nebula so much I decided to give it a try. Eq3 Pro, Canon 700D astro modified Samyang 135mm f2 @ f2.8, IDAS LPS-D1 clip in filter, QHY5 guide camera, 9x50 finder-guider, QhyCCD polemaster. Location: Woodland Caravan Park, Pontarfynach, Wales, Bortle 2 Date: 05.05.2019 The image is the result of 21x180sec ISO800 exposures stacked and calibrated in DSS and processed with Photoshop CC 2019 and Lightroom CC. Emil
  23. 23 points
    The beautiful Needle Galaxy, 50 million light years away! I'm still getting to grips with RGB imaging, and not entirely convinced it's for me yet. Here is my image of NGC 4565 purely from last night. I devoted pretty much the entire night to single object, getting up at 12:30am to do a meridian flip and assess focus of RGB filters. LUM = 18000s RED = 7200s GREEN = 5400s BLUE = 6300s Stars look bigger than I would have liked, and the dust isnt as well resolved as I had imagined. Thanks, any comments would be very welcome. Adam.
  24. 23 points
    Second light for the Twin TEC140 rig. Starting early we managed 11 hours (5.5 per scope) on the Draco Trio, the spiral being NGC5981. (The rig is O'Donoghue-Milne-Penrice.) I'm beginning to think that the Luminance scope is out-shooting the colour slightly. I've been using 15 minute L subs on one side and 10 minute RGB on the other (to preserve stellar core colour.) I think some tests with 15 minute colour or a short booster colour run on the 'Lum' side of the rig might give better results but this is a conversation to have with the other kit owners as well. The full field looks like this: For a 'no hidng place ' crop I ask you to be kind! Thoughts most welcome... Olly
  25. 23 points
    This image took me 18hrs to capture, quite a few subs had to be chucked out due to high clouds and really bad signal but in the end i managed to salvage a few to be able to process it. First image using Skywatcher Esprit 100 which consists of 50 x 300s (Ha, SII, OIII) subs. Fully processed in PI. Hope you like it. Comments and critiques are very welcomed
  26. 23 points
    The ultimate photo-op! Comet Iwamoto 2018/Y1 Guest Anne van Houwelingen from the Netherlands astutely spotted this possibility. He used our Tak 106/Atik 11 meg/Mesu 200 to image the comet in 2 minute subs, LRGB, just as it lay in the field of an image I already had from the same instrument a couple of years ago. He then processed versions with and without stars. We used the one with stars to obtain a very precise location and orientation for the comet so we can be certain that for two minutes, at least, it was in this exact position. We then combined the comet with the widefield by sharing ideas in Photoshop. A most enjoyable project. Olly and Anne van Houwelingen.
  27. 23 points
    Between the clouds, moon, neighbour's roof, nearby floodlights, and all the usual general life stuff, i've simply not been able to get any meaningful data on the HH (or Orion for that matter either) for the last 2 years! To say it's been my nemesis would be an understatement. At this rate i'll be glad to have that box ticked proper before i hit 50 ? So when we had a few hrs of clear sky (and no moon) a couple of weeks back i knew i had to give it a go. I luckily managed 9 x 7mins before it disappeared behind the neighbour's roof. I also have 5 subs of Ha (90 mins in total) from last March, although it wasn't of great quality (there was a nearly full moon right beside it, plus the neighbour's fire smoke was billowing up through the Fov ? ). I've been waiting patiently for more clear skies to add to this, but that 's not working out too well, lol. I really shouldn't be processing this, but all work and no imaging makes Ciaran a dull boy, so here goes nothin... 9 x 7mins with an IDAS-D1 4 x 1200s and 1 x 900s of Ha ~2.7 hrs in Total Stacked in APP and processed in PS. Lots of heavy lifting needed in PS, and i've reduced it to 50% in size as well. For now, at least, this will have to do. There's a lot of good HH's about so hopefully this one's not too hideous! ? I'll post what the 2 raw stacks looked like below as well, just for kicks. Here's the 9 x 7 mins raw stack (with DDP stretch): And here's the ~90min Ha raw stack:
  28. 23 points
    We were lucky enough to spend two weeks over Xmas and New Year on La Palma with the family. It was my first visit to the island and loved the place. First week we stayed at the Northwest (Puntagorda), that coincided with full moon, so did not do much imaging wise. However, a very memorable moment was when stepping outside between the main curse and dessert of Xmas eve dinner and within 5 seconds of looking up, I saw a large fireball meteor sweeping accross the sky and breaking up into several pieces. Second week we stayed about 10mins drive from Santa Cruz, so was worried about light pollution from the capital, but the first night it become obvious that the sky was still one of the best I've ever seen. The small light pollution is in the form of sodium lights, so can be dealt with by filters (apart from some flashing LED xmas lights around). The equipment I took was a Fuji X-T1, modded Canon 6D, Samyang 135mm and 35mm lenses, and Fornax lightrack II. Unfortunately, at the end I couldn't use the Canon as I found out there that its remote release connector is different, I use a Canon compatible intervallometer for the Fuji, and just assumed it was the same for the 6D. At home I've been using the 6D with the laptop, which I did not take with me to minimise the amount of kit. Learnt the hard way that everything needs to be tested before the trip and assume nothing. Anyway, I was enjoying using the X-T1 / 135mm combo on the Fornax, it was very quick to set up and worked very well. Fast lens meant that max exposure I needed was 2mins, which the fornax coped with easily. We visited the GTC and was hoping to see one of the other telescopes, but I've messed up the booking and bought tickets for the GTC twice, so that will have to be another time. Also drove up to the observatories in the evening and was hoping to do some imaging, I unpacked the equipment, but was so cold with strong winds (at some point I had 3 jackets on) that I basically bailed and just did some very wide field shots. The fun bit was when we got too cold and was ready to go down, the car wouldn't start. ? It was around 10pm, nobody around, no moon, so pitch dark. I'm still not sure why the car battery went flat, I run the Fornax off the cigarette lighter socket, but its power consumption could not be the reason. To have voltage in the cigarette lighter, the key had to be turned to ignition on, so I guess in that state something was taking current in the car, we did not have any interior / exterior lights on. We thought we might have to sleep in the car, when after about 20mins I saw a car driving down, jumped in front to ask for help, and the chinese couple inside very kindly helped to push the car to jump start it. This was a major struggle as the parking platform was lower than the road, so the car had to be pushed up the ramp. When the car eventually started I was ready to hug those friendly people but they were in a hurry... The sunset and the views of the milky way were amazing up there, still I've decided after this adventure that I rather put up with the little light pullution I have on the balkony of the nice warm house and my bed nearby. So, overall a few mishaps, but it just means that I definitely have to go back again in the summer, timed so that it coincides with new moon. Anyway below are some of the quickly processed images I took, also have some 46P data but haven't managed to process that to give anything decent yet. All processed in Astroart / Gimp, however my processing skills are not very advanced, still need to learn about layers, masking, etc.
  29. 23 points
    The Nine Stones Circle dates back to the bronze age and is located in the Peak District close by Robin Hood's stride and the village of Winster. Now there are only 4 stones left (in fact there may never have been 9) but they are the tallest prehistoric stones in Derbyshire the largest being a little over 2 metres. Auriga hangs nicely over the circle in the early evening and fitting for a bronze age charioteer! This was a single shot using a Canon 80D with a Samyang 14mm lens at F3.5, ISO 1600, 25 seconds I have taken out an artistic license and emphasised the main constellation stars a little Pixel peepers will have no problem spotting the off centre optics. This is a nearly new lens (the F2.5 version) and it's first proper outing. Unfortunately the tripod toppled over a bit later causing a minor scratch to the front lens so that rules out any chance of sending it back. Oh well, Happy with the pic though.
  30. 22 points
    Well, I figured I'd stick with a target for the two flawless nights of clear skies I got Thursday and Friday, and picked on M51. Setup: Skywatcher 200PDS on EQ6-R, Baader LRGB in EFW Mini, ASI183MM-PRO at -10c, HitecAstro DC focus, guided with ASI120MC through a Primaluce Lab 60mm guidescope. Capture: Post ditching the crap frames, 51xL, 25xR, 27xG, 27xB, all 120s exposures. Processing: Stacked and processed entirely in PixInsight. General workflow was cal, hot pixel correction, registration, linear fit stacking, order a 32G RAM upgrade for next time, deconvolution on L, DBE on all, channel combination and photometric colour correction for RGB, multiscale linear transform noise reduction, histograms, LRGBCombination, final masked MLT and global TGVDenoise, a gentle ABE mixed in with PixelMath, local histogram equalization, a bit of gentle masked saturation tweaking, unsharpmask and curves. Quite happy with the result overall, though there's still some calibration issues - I have no way to make flats and my darks are out of date and not at 120s so PI's optimisation didn't quite null out all the amp glow from the 183. Deconv is still slightly unsatisfying, even with careful masking.
  31. 22 points
    Apennines taken through a C 9.25 recently. Imaging source camera
  32. 22 points
    Monday night it finally cleared and 2 am - 5 am on Tuesday morning I had my two Esprits directed at these two Messier galaxies. I collected the RGB with the ASI071MC (OSC) sitting on the Esprit 150 (38 x 5 min at gain 200 offset 30) and the Lum with the ASI1600MM (89 x 2 min at gain 139 offset 50) sitting on the Esprit 100. Ideally I should have collected the Lum with the larger scope but both galaxies would not have fit on the smaller chip of the ASI1600. Still, the lum collected by the smaller scope helped a lot. Stacking, aligning and a few other minor things in PI, the rest processed in PS. Totally 6.1 hour and very happy to finally get some data of my own!
  33. 22 points
    As the title says: Oi, this is not a foot warmer! A cheeky bird seems to think otherwise. Thankfully it didn't relax completely, if you know what I mean, and leave a small deposit slap bang in the middle of my Oculus dome!! I don't think that it is a widefield view of Corvus!
  34. 22 points
    Bit of end of session fun as the the moon began to rise- a single 400s sub of the Horsehead & Flame nebulae in Orion. Taken with a GSO 8" F4 Newtonian scope and ASA Keller 0.7x coma corrector reducer (giving an effective focal ratio of F2.9). Camera was a Fujifilm IS Pro full spectrum @ ISO 1000. From a dark sky site in Mid Wales.
  35. 21 points
    This is the 2nd shot from my recent trip to the dark sky location . approx 51 images stacked @ 20secs a mix of ISO 3200,6500 & 10000 Sonya7RII Tokina F2 20mm Firin Lens Milkyway by Danny Kenealy, on Flickr
  36. 20 points
    Hi SGL folks - I haven't posted for a long while & tbh we haven't managed very much imaging this year for a number of reason so far...equipment hassles but mainly clouds...clouds & more clouds! We had to resort to the venerable ASI224MC last week where the seeing was pretty decent - here's an image from that morning (26th March) as well as a 24-frame reversing animation using WinJupos to interpolate additional frames to complement the number of captures we actually took by making additional frames from adjacent captures... We also lashed out & bought a Stellarvue 10x60 finder scope & mounted it on a SkyWatcher adjustable alt/az guidescape mount which is secured via a dovetail bar & clamp to an extra "rail" I constructed from 3mm thick folded aluminium -this device to come in useful for hunting down Neptune more easily later in the year. Lastly I converted an old aluminium pier with detachable legs to accept the EQ8 head with a plate I made from a piece of scrap plate aluminium - the ability to break this all down into 4 very light & small pieces (3 legs & the pier column) means it is much simpler & far lighter/easy to take with us & assemble...the 3 self-levelling adjustable height feet I purchased for the legs makes levelling the entire setup much simpler, it's a veritable breeze now & weighs so much less than the very heavy stock steel EQ8 tripod! Hopefully the animated gif won't need clicking on to start its motion!
  37. 20 points
    It's been clear for a few days down in Devon. I say clear - it's been murky and hazy... but, a clear sky is a clear sky... In between getting subs for an image of the Leo Triplet I'm working on, I got some RGB of M13 as it rose up in the east over a couple of nights this last week after the Leo Triplet crossed the meridian and entered the murky light polluted skies in the direction of Exeter. M13 is one of those fairly rare objects that I think look every bit as good visually through a scope as on an image I can't quite get over the number of little galaxies that are visible if I stretch the image a lot more than I have here. As it is there are quite a few, one off to the upper right, one near the edge of the field of view, but also at least two visible on the right hand side near the end... I used an ASI1600mm-Pro through an Esprit 120 with Astronomik RGB filters. 20x 20 seconds each of L, R, G, B so less than 30 minutes data - actually, by dithering I probably doubled the time taken... Now I have to hope for more clear skies to finish off my Leo Triplet!
  38. 20 points
    Dear all, yesterday evening, I set up my 5" MAK on the terrace and had a look at the lunar terminator. A cone shedding some light to a dark and large crater attracted me. After doing the sketch, enjoyed looking up the craters in my lunar atlas books and in the "Geologic History of the Moon" (Don E. Wilhelms) to learn a bit about what I have sketched. Grimaldi: With a quick check in the maps it turned out to be basin Grimaldi. Named after an Italian physicist and with a diameter of around 170-170 km, this pre-Nectarian basin filled with dark lava (Eratosthenian age) is dominating the western part of the full moon. Yesterday the sun has raised just on the eastern rim of that nice area. Lohrmann: North of Grimaldi, a small lentil-shaped, bright crater rim with still black crater floor was popping up from the darkness: This was the crater Lohrmann with a diameter of just 30km which is supposed to be Nectarian age. Hevelius: The next crater at the terminator has been the Nectarian crater Hevelius. The surface of that crater named after the famous Polish astronomer Johan Hewelcke (Hevel) is supposed to have formed in later Lower-Imbrian age. Inside the 115km large crater, its central peak and the eastern rim of secondary crater Hevelius A appeared in light above the dark floor. Cavalerius: The last crater of the sketched chain further north, Cavalerius, has formed later in Eratosthenian age. Like Grimaldi named after an Italian, this time the mathematician Buonaventura Cavalieri. The diameter of the bright rim is about 60km. The crater floor was still in Lunar darkness. But now have a look at them: Telescope: Celestron 5" MAK Eyepiece: ExploreScientific 14mm/82° Date & Time: February 17th, 2019 / 2100 - 2210 CET Location: home terrace, Dusseldorf region, Germany Technique: Koh-i-Noor chalk and charcoal pens on black 'seawhite of Brighton' sketching paper Size: 21 cm x 28 cm Clear skies! Achim
  39. 20 points
    FSQ 106, ASI 183 G:75, Mesu 200. 108x5min L, 40x5min RGB/channel I always found this one hard to process, but with when the data is OK, it's pretty straightforward. M78 by Yves, on Flickr
  40. 20 points
    Melotte 15 the Heart of the Heart. Captured over 4 nights 18, 21, 26 and 30 Nov whilst dodging the clouds and rain. Esprit 150ED on AZEQ-6, ASI1600mm, Astrodon 5nm Ha, Oiii and Sii and ZWO RGB filters. 28x600s Ha, 20x600s Sii, 10x600s Oiii and 10x120s each RGB. Processed in Pixinsight and finished in Photoshop with a little help from Noel's Actions. Red is 50% Sii 50%Ha, Green 20%Ha 80%Oiii and Blue 100%Oiii combined using Pixelmath. I choose this combination as it mitigated the magenta halos I was getting with SHO combination. RGB stars added together with a few diffraction spikes.. Could do with more data especially Oiii which it will get when the clouds clear. Thanks for looking Dave
  41. 19 points
    Hey guys So with no new data at hand (or on the horizon it would seem) i decided to go back and re-process my short stack of M81 & M82, being the glutton for punishment that i am! The last time i re-processed this was about a year ago, so i was curious to see if i could get any more out of it. It's hideously low on data (nothing new there!), this is just 9 x 600s of colour (with an IDAS-D1) together with 7 x 1200s of Ha (which i only used to Lighten the Reds in the Ha jets of M82 and the small spiral regions of M81). AstroPixelProcessor used for stacking and gradient reduction, and PS for everything else. I mistakenly shot the colour at ISO 800, instead of the usual 200 i always use. A mistake i imagine every DSLR user has made before! And i have to say i really noticed it during processing. There was noticeably less colour in the stars. That being said, i was still able to bring out more colour in the core of M81 this time. And i think M82 looks a bit better as well, it was definitely over-sharpened before. I really love these targets, but they just make me wish i had more reach! CS! Here is the original thread: And here's the new one, including a cropped version:
  42. 19 points
    I think I'm going to have to get out the 8" reflector for galaxies but I thought I'd have a go at M63 under last nights clear skies with my Esprit 100 which was already setup. This is about 40min each for RGB and 3.3 hours for L with ZWO1600pro.
  43. 19 points
    Eagle and Swan: I was never really happy with the processing of this data and couldn't put my finger on what was wrong so I had another go. It also got me thinkiing about the summer skies which was no bad thing in the dead of winter! I hope the stars are now better and the emission nebulosity deeper. HaOIIILRGB. Atik 11000 mono/Tak FSQ106N. High res data for the Eagle added from ODK14/SXVH36 and for the Swan from TEC140/Atik 11000. Olly
  44. 19 points
    Hi everyone I saw a cheap 'Russian' -it says USSR on the lens ring- 300mm lens on eBay for €50. Just for curiosity I took this snap, never expecting anything like. I was surprised at the colour and corner correction it gave. It would be a great way to make a start in ap with a dslr; my Canon kit lens comes nowhere close. Interesting... 700d: 90 minutes @ ISO800
  45. 19 points
    Last night's session was only about an hour or so before bed from my back garden. Not the type of session I would normally write up. It was around 11:45 PM by the time I got outside. It has been patchy cloud for most of the evening and I had a bunch of stuff to do around the house too. On going outside the first thing that really caught my eye was the fact Sirius wasn't twinkling quite as much as normal. This gave me hope that the seeing would be steady. I took a look at M42, and the 4 main stars of the Trapezium were nice and sharp within the green nebulosity. I put the 6mm BGO into the focuser, giving 200x, and settled on the Trapezium. Straight away I could see the E star. Not my first observation of this star but I certainly don't get it every time. No sign of the F star but the view was nice and steady. I had two passes of letting the trap pass through the eyepiece, adjusting focus to try and draw the elusive F star out. On the third pass, the E star stood out well and finally the F star also showed itself! I've regularly referenced failed attempts to see the E and F stars in my observing reports going back to last autumn when I using a 130mm reflector. It's a small personal victory! I enjoyed a few more passes to confirm the observation. By the end, I could hold the F star comfortably in direct vision. Following the successful split of the Trapezium, I went onto try for Sirius' companion, the pup star, but no joy. I think some more research is required to figure out the best approach for this split. Sigma Orionis was a nice easy split with all 4 stars easily seen. I added an OIII filter and observed NGC 2174, the Monkey Head Nebula. I didn't see it as a Monkey head but could comfortably trace the edge of this nebula. I next spent a good amount of time trying to pick out the Flame nebula, NGC 2024. I tried various magnifications and putting the Flame's location at different points in the field of view. A couple of times, I felt like I was detecting faint nebulosity but nothing that I would count as a conclusive observation. The Rosette Nebula, NGC 2238, was quite the opposite. Thick nebulosity was easily seen with sections of fainter nebulosity detected around the central cluster. A quick look a the fun Christmas Tree cluster, NGC 2264, following by the Pleiades, M45. For the finale, I tracked down Hind's Crimson star, a stunningly red star which seems to just pop out when it catches your eye. Very enjoyable short session with another observing goal ticked off the list.
  46. 19 points
    The sky here has been on and off, meaning that it is sometiems clear when I take the last walk with my dog Balder, when it is supposed to be cloudy, and other nights I am set up and ready and everything is ruined by clouds. So, I have entertained myself with public data including this 0.4 hour image (4 x 4 subs of about 80 seconds of R, G, B and Ha) from the Liverpool Telecscope - a 2 metre RC scope on a mountain top on La Palma in the Canary Islands. I wish there had been more data but with a scope this size and a very very nice CCD camera it is still quite presentable.
  47. 19 points
    Processing this was a bit of a challenge to say the least. My Comet only stack left very noticeable blue streaks near the Pleiades and I couldn’t remove them. They were even worse after I’d removed the large light pollution gradient near the bottom. So I cheated a bit, well it seems like cheating. I split both images in two, then used Gradient Merge to recombine half of the Comet only image with the good half of the Stars only image. I’ve darkened the background quite a lot to try and hide residual star streaks in the bottom half of the image, so don’t look too closely. I was very pleased to catch it with The Pleiades in the early hours of Sunday Morning. The rain and the absence of some street lights had improved the subs compared with my previous comet image. Its the same set up as before, Canon 450D, 135mm on Star Adventurer, F2.8 ISO400 about 1.5 hours of 30 second exposures, processed in PixInsight. Hope you like it.
  48. 19 points
    Furthermore to my first light with the ASI1600 here... .. I finally managed to process the RGB data I collected a couple of weeks ago. I tried to gather the Lum again to match the orientation of the RGB on the night but fog rolled in at 2am! So I've had to crop it right down to use the Lum from previously. The seeing on the night wasn't great at all but it was more a test to see if the Idas D2 cut out the local light pollution. I'm used to dealing with extreme gradients if I image from the back garden. I'm pleased to say that once DBE was performed on all the masters and once again when combined it was pretty clear! I'm not entirely convinced just yet, will try a few more targets from home and from the local astro club dark site to compare. Anyway, it's not a show stopper by any means. Only an hour each filter. The stars are way over saturated. I tried a different approach to the usual nuke in STF and then Histogram Transformation. The stars were very bloated that way so I done a Masked Stretch instead and they came out smaller and the background had more contrast. Comments and critique welcome! 60 x 60s Lum 30 x 120s each RGB ASI1600MM, Baader filters and IDAS D2 LPS.
  49. 19 points
    NGC 1514 is a planetary nebula in the constellation Taurus that was discovered by William Herschel on November 13, 1790, describing it "A most singular phaenomenon" and forcing him to rethink his ideas on the construction of the heavens. Up until this point Herschel was convinced that all nebulae consisted of masses of stars too remote to resolve, but now here was a single star "surrounded with a faintly luminous atmosphere." He went on to conclude "Our judgement I may venture to say, will be, that the nebulosity about the star is not of a starry nature". It has since been conjectured that the nebula in fact envelops a tightly orbiting double star with a period of up to 10 days. Gas is presumably expanding away from the larger star of the pair. 15 hours 30 minutes total capture R 20x300 G 20x300s B 20x300s Ha 21x1800s Image captured remotely at Alcalali, Spain APM TMB 152 F8 LZOS, 10 Micron GM2000HPS, QSI6120ws8
  50. 18 points
    Persevered and got 5 short subs between the clouds and gusts of wind, no calibration as you can see Dave
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