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Showing content with the highest reputation on 05/05/19 in all areas

  1. Yet another good transparent night and I promised myself whatever the time I would have a session on the delights of Virgo and Coma Berenices. I set up the 12" Dob with its 80mm correct image finderscope and started with the Leo Triplets and NGC3628 was showing itself very well. I know from experience that the best place to start galaxy hunting in Virgo and the Markarian Chain is to go from star 6 in Coma B. This will give a start at M98 and M99 and whilst in the area M100. Moving to the M. Chain I used the 20mm Myraid which helps with the extra FOV to identify each galaxy whilst mo
    16 points
  2. Last night I popped out around 11pm to my "usual" local spot on the coast. As I got out of the car i noticed that the house with the session wrecking security light had it switched off, and wow, the sky was looking good overhead and to the south. There are low horizons all round with the beach/sea to the south. It was like being in a snow globe that had been shook The LP domes from towns to the east and west were not as bad as they often are - transparency was decent. I threw up the scope, popped in a 10E, and first target was M51. Wow. I wasn't even dark adapted, but there
    10 points
  3. This new moon period seems to me to be the last opportunity to have a good DSO observing session before the nights become too light. And as the forecast was suggesting clear all night, I decided to have a bit of a bumper session. My plan was to start with a few galaxies then move onto Cygnus which would start appearing after midnight. I thought I may even get a shot at the lovely nebula in Sagittarius despite being a bit low. I also wanted to target some smaller objects I haven’t seen with night vision before, so I needed to get a bit of aperture and therefore decided to use my Celestron c11 s
    9 points
  4. Lovely sunshine here today, seeing started off fazey but good then 9am started going downhill. the AR is looking nice now its moved onto the disc more, some nice proms too. clouded out by 09.30am darn weather eh. kit starwave 102 f11, quark, asi120mc. wishing you all clear, thanks for looking. charl. AR2740. PROMS lower oncoming limb proms just up from the AR.
    8 points
  5. I finally got my color for M51ñ it started out slightly problematic, this is as well as I could catch up in a first process. There´s a small ha component in it, I just couldn't get too heavy handed with 6 5 min. ha subs. Altogether about 5hrs LhaRGB in 10, 5, 3 and 1 min. L subs, 9x9x9 RGB, 6 ha ones. As always, no calibration frames, after a night in the cold far away, I didn't want to stick around for dawn twilight flats. 1LhaRGB, 1 HaRGB. - Andy -
    6 points
  6. My first effort at Sol for a while and in spite of the clouds and the wobbly seeing I did manage a few short vids of AR2740.
    5 points
  7. Such an inspirational and iconic galaxy, but just so low and hard to image. This is my second time trying this one, inspired by Ciaran. My 10" just wasnt wanting to be guided, so I went for 45s subs, binned 2x2, with Atik 383L+. There was a large moon too. I did this just before I packed up. Last night I belt modded my mount, so it will be interesting to see what difference it makes if I get a clear sky later. No point in just posting the 'good ones', post the ugly ones too. ?
    5 points
  8. Well I got lucky with the weather last night and took a trip down to Rhossili on the Gower peninsula, with a nice dark southern horizon. Unfortunately my tracking was awful, not sure if this was due to the wind or the fact that it was so low in the sky, but I managed to stack the best frames I could. Probably threw about 70 % of them! I think guiding would have helped a lot, something which I’m going to start doing. Anyway here it is 16 frames x 60 sec ISO 1600, manually dithered, very pleased!
    5 points
  9. It is not often in the UK that we have a bank holiday weekend, a new moon and a clear sky at the same time. Last night was one of those rare occasions! The forecast (Clear Outside) was not very definitive about the cloud cover, but from looking at the satellite images and from experience, I thought this could be a magnificent sky as we were on the backside of the last weather front. So, I thought – let’s give it a go, we could be rewarded. By 9pm the car was packed with the C8 and my trusty Vixen SP-DX. A quick check on my friend Steve, and yes, he was up for it, too. Steve is
    5 points
  10. Whether 'tis nobler in the mind to suffer the amp glow and background noise of outrageous exposure times, or to take arms against a sea of artefacts and by stacking, end them: to image, to sleep no more; and by a sleep, to say we end all chance of capturing that faint nebulosity. James
    5 points
  11. Hello there, In order to get a good feeling of what it’s like to do some stargazing from a labeled dark sky reserve area, some members of our local astronomy club have spent a full week in Saint-André-Capcèze, Lozère district, right between Villefort and Génolhac), at the guesthouse « Au Portaou » (www.au-portaou.com). Since the owners of this guesthouse can speak fluently English, German, Dutch and French (she’s from Belgium, he is from Germany) please have a look and feel free to go there a week or a couple of days, you will be impressed by the sky quality, and pleased by the warm welco
    4 points
  12. First Light using my new scope, Skywatcher 72ED APO. IC 2944 Ha 8 x 10min No darks, flats or bias done, still working on them.
    4 points
  13. TOA 130 and STT-8300. This is some old data that I was never able to process very well. The shortage of blue and the general noisiness of the data were obstacles I could not overcome. I wish I had gotten more data--I really like M78 at this scale. The image is still pretty rough, but much better than previous attempts 17 10 min red 17 10 min green 6 10min Blue
    3 points
  14. Good morning all, I'm off a few days, so I just knew the weather would be awful. To my surprise yesterday I had some sky time. This morning, the storms are here. There's lots of clouds and raining here and there. A big lightning storm just rolled through. I set up regardless and cracked the top of my observatory, a little tenacious defiance against the odds, that I might get a sucker hole at the very least. I was only out from 9am to 9:30am because it was just too nasty. Literally raining. But sometimes a tiny sucker hole passes through, with just enough transparency to get something. It
    3 points
  15. Today, I am mostly a martyr to cumulus.
    3 points
  16. Heres the new AR today, seeing here is fazey again but good when its in focus. theres some lovely proms too if you get chance for a look. heres a qwick snap of the AR. Clear skys all. charl.
    3 points
  17. I basically agree with @pregulla. The C8 gives you a higher power, narrower field of view, so a nice widefield refractor will complement it very well giving you the best of both worlds. Personally I would go for a 4" apo doublet of some sort, possibly something from TS would work well such as this one. https://www.teleskop-express.de/shop/product_info.php/info/p9868_TS-Optics-PhotoLine-102mm-f-7-FPL-53-Doublet-Apo-with-2-5--Focuser.html
    3 points
  18. I found this data on my hard drive-I never processed more than the Ha due to only having 4 OIII subs. I decided to give it another try, hoping that my processing had improved to the point where I could get something passable out of it. I lost some FOV due to poor framing, and the OIII subs could only be calibrated with a master dark--the flats were lost with my external hard drive. TOA 130 with .7x reducer and STT 8300 with 3nm Astrodon filters Ha: 9 30 min OIII: 4 30 min
    3 points
  19. I had a lovely session last night out in the Brecon Beacons. The transparency wasn't brilliant but I've come to expect that recently. There always seems to be some sort of high level haze or passing thin clouds. The Milky Way was visible but not particularly distinct low in the sky. I was using my 8" reflector. As it was still rather light at 11pm, I decided to start with some bright targets and although it was in the west I had some nice views of the open clusters in Auriga M36, M37 and M38. I had a quick look at the Ring Nebula, M57, in Lyra. Very bright and as always benefitting
    3 points
  20. Sun 05 May 2019 03:36:36 BST
    3 points
  21. Milky Way showing now - top left corner. 90s exposure, gain 200, temperature -20.8°C.
    3 points
  22. Many details visible across the planet, interesting to note as the two white ovals above the Oval BA are keeping constant.
    2 points
  23. This may be my last galaxy image of this season, Markarian's Chain 90 mins Luminance, 50 mins each R,G,B all in 300 sec subs. WO Megrez 90, Hotech flattener, ASI 1600 MMC, set for Max DR (Not Pro), ZWO filters. HEQ5 Mount, ST80 / QHY5II. Guiding in PHD2, Capture Maxim DL6 Stacking and Post in Astro Art 5. R, G, B Sigma Average stacking with Darks but no flats, Luminance Sigma Average with Darks and Flats. Adaptive divide gradient removal on each stack and as much line removal as I could do. LRGB synthesis, followed by adaptive subtract gradient removal (Better than Divide for RGB im
    2 points
  24. I always like to look for distant worlds in the sky, and when I stacked 400 minutes of luminance captured for my new project, I found some faint flocks at the frame edges. It turned out to be distant galaxy clusters located 2600 and 3000 millions light years away: http://simbad.u-strasbg.fr/simbad/sim-id?Ident=%408444694&Name=XMMXCS J0953.7%2B6947 and http://simbad.u-strasbg.fr/simbad/sim-id?Ident=%4010548357&Name=SDSS J095324.38%2B693648.7 . M82 is about 12 million light years away for comparison. There are not much information available about these clusters, just two more among pl
    2 points
  25. Milky Way- Sagitarius through to Cepheus (105 degrees of sky!), Powys 3:00am this morning. Stack of seven, 300 second exposures.
    2 points
  26. A 4" ED refractor will be far more versatile than a 5" Mak, as it will give you the wide field views a SCT or Mak Cass can't. A 4" ED like Stu suggested above would be a perfect complement to your 8" SCT. Another option may be a second hand SW 120ED, yet it is still easily transportable and doesn't need a heavy mount. The ED refractor will also have the added advantage of being truly sharp with great definition and very high contrast.
    2 points
  27. c80 ed 450d moded. 20x300 sec,20 flats,20 bias.
    2 points
  28. Congratulations on your new travel package. My Equinox 80 is coming with me to Morocco next month. I've had excellent planetary views at 170x with this scope - so it's a great all rounder.
    2 points
  29. I can't recall if this has been posted before here (apologies if it has) but I found this short NASA movie on the recently discovered major crater under the Greenland icecap interesting. It seems that it was a relatively recent event compared with some of the major events in the more distant past:
    2 points
  30. This is my take on these two popular targets. I used 600s exposures instead of my usual 300 to see if it made much difference. Total of 36 x 600s in Lum, 20 each x 600s of RGB. Processed in PI. I have cropped the image to show more detail in the galaxies. Comments and criticism welcomed as always. Link to hi res is below. https://astrob.in/404237/0/ CropV1.tif
    2 points
  31. Excellent thread Gavin! The C11 is really working and it is showing many objects as I see them with the 15" dob, very similar. Can I ask how dark your sky was during this session? just for my own reference. Your NV is showing some better, one a bit more subdued and many extremely similar to my traditional views. Under my best skies, fully dark adapted, M51 is better in the eyepiece with the arms showing more definition, extent and the bridge is more complete. The Needle is very similar with the dust lane showing more extensive and the Binotrons in particular will bring more out.
    2 points
  32. 2 points
  33. I found using a red dot or illuminated reticule finder combined with a low power eyepiece (eg: 32mm plossl) helped me a lot when I started out trying to find things using star maps and planetarium software. I've since found that also having an optical finder alongside the RDF type finder aids more detailed star hops to more challenging targets. The other thing is that you learn slowly how things actually appear through an eyepiece and often they are much more subtle and faint that you might expect and you realise that you have been looking at them but just did not notice !. Gradual experi
    2 points
  34. 12 x 120s Lum 6 x 120s RGB It was late, sun will be up soon. Lum sub 13 was white out with clouds... by sub 17 it was daylight. Taken last early this morning. I will visit this later, when its higher for more data. Thanks for looking. Dave.
    2 points
  35. First video after lunch, sky milky white but less cloud. 4.32m f/l. Bit happier with this one.
    2 points
  36. Excellent report Niallk - its these nights that keeps us happy and dedicated.
    2 points
  37. Great report! Visited some of the same targets last night too I agree - there are several globs well up there with M13: just wonderful objects to see with your own eyes. As Richard Feynman said of globular clusters: "If you can't see gravitation acting here, you have no soul!"
    2 points
  38. Captured image from shortly before dawn this morning at the time of the ISS passover. Just visible in the SE. Sun 05 May 2019 03:22:07 BST
    2 points
  39. Hey all, Lots of clouds this morning and only ok seeing, but managed to get a little bit of AR2740 and the proms around it. It seems to have thrown some lovely surge proms later, but I'm clouded out for those. This was around 0930am Eastern when I captured these. Captured in HA, WL & CaK at various scales to compare as seeing allowed. Saw a little tiny flare activity around the spot. B&W: Colored: Equipment: C8 Edge + Aires Tri-Band D-ERF + Baader 2" UV/IR Block Filter *Daystar Quark Chro
    2 points
  40. Actually, you'd need to take the Newtonian completely apart, for a proper job. Ah, but no more ghosts and goblins within the field-of-view. When observing an object, the contrast would be noticeably improved, to see its details more clearly, and the background sky surrounding the object would be blacker, instead of just grey-black. Have a look at what I did to my own... https://stargazerslounge.com/topic/262096-deadening-a-150mm-f5-newtonian/ Any questions? I'd be glad to help.
    2 points
  41. Very nicely captured, the return drag me out between the showers as well. I also have used a green filter, before I had purchased a Continuum filter. The green filter I found was very effective and not that much different from the more expensive Continuum filter.
    2 points
  42. This is one of the most common misconceptions in astro imaging, mono collects data faster than one shot color You will get a better image in three hours with the mono. In three hours you would do the following. Lum = 1.5 hours Red = 0.5 hour Green = 0.5 hour Blue = 0.5 hour Total = 3 hours So if you assume that each RGB pixel collects 1/3rd of the signal of the Luminance filter then you get the following. The formula for light gathered per channel is: (Filter transmission as a percentage of Lum) x (number of active pixels) x (integration time in hours)
    2 points
  43. Oh for goodness sake - I thought all this was cleared up back in 2047. ?
    2 points
  44. The space dragon seems to have eaten the bottom corner, was that intentional? The rest is fantastic!
    1 point
  45. Thanks All. Andy I'm booked into my first one in three weeks. Yorkshire Dales, Bortle 4 skies. Other places I intend to visit this year are the Lake District, Snowdonia and Bowland. All Bortle 3/4 skies. May do a couple of Astro camps funds and time allowing. Also applied for membership of the local Astro Society.
    1 point
  46. Great report @GavStar What do you have the C11 mounted on as a matter of interest?
    1 point
  47. I think this is a bit better-more realistic
    1 point
  48. APT can either the mount itself if you are not guiding or it can command PHD to dither. If you press Gear and then Guide, in the settings box, it should give you a list of control options. If using PHD or PHD2 you would choose these. Or, if your doing short exposures and your mount can cope without star trails, you can forgo guiding and APT can dither itself.
    1 point
  49. Now I'm confused, to dark or not to dark, that is the question.?
    1 point
  50. I’m looking into this now.
    1 point
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