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Showing content with the highest reputation on 20/09/20 in Posts

  1. 13 points
    My final image from my stay at our East Sussex campsite Bortle 4. Atik460EX and Samyang lens 135mm @ F2.8Ha 13 x 600Red 5 x 300Green 12 x 300Blue 12 x 300Ha blended into the Red channel so there was not much Red data taken, mainly for the stars.HEQ5Total 4 1/2 hours
  2. 12 points
    Had two clear nights in a row this weekend at my caravan in Cumbria. Here’s the haul from Friday and Saturday night. All images through the TS71quad with ASI071MC Pro and just an IR/UV cut filter. Gain was set at 150 and cooling to 0C. All guided and captured with ASI Air. Stacking was in Deep Sky Stacker and processing was done in StarTools. First up was The Iris Nebula - 25 x 5 minutes Then M33 - 16 x 3 minutes Then Barnard 111 in Scutum - 29 x 3 minutes Finally a cheeky little Double Cluster - 20 x 2 minutes
  3. 10 points
    NGC 281 "Pacman" ZWO ASI294 MC Pro TS APO65Q HEQ5 Pro SynScan mod 300x60s unity gain, offse30, -15° Zwardoń, Beskid Żywiecki Mountain, Poland
  4. 10 points
    Here is my second attempt to shoot my first DSO. Andromeda with Nikon d850 + 70-200mm f2.8 and Star Adventurer Pro. 52 stacked images
  5. 9 points
    Dedicated to Nick (cotterless45) who has recently assisted me in getting back behind the eyepiece! Starting with a Skywatcher 114p I very quickly got the bug sometime way back when... Amazed at what I could see from as many dark sites as I could visit I was hooked. I very quickly moved on to buying great second hand equipment (almost every week) from this forum, eBay and AstroB&S I was even lucky enough to be persuaded with a mate to start a stargazing social club at work and use some of the club funds to buy a 200 Dob and a 200 motorised on an EQ5 and EP's. Unbelievable hunting and viewing continued. Then my first Starparty in the Peaks where I had the great fortune to tent up next to Nick... I never used my own little scope that weekend and was given skytours, much banter, vodka and a new insight into the world of the Astro nuts I lived in a first floor flat so viewing was always an epic, getting all the equipment down and into the car everytime I wanted to try to observe... Many rubbish nights with cloud, no location etc. solo observing is not always great when it goes bad During those years my interest came and went, I got into buying bargains and selling unwanted stuff - I look back at the pictures of great scopes I used to own... But in general I found I was only ever using my weapon of choice every time I went out, so everything else was just sat there gathering dust. I'm lucky in that since retirement I've travelled a fair bit. I've seen the southern hemisphere several times and in one amazing twist of fate ended up on Mauna Kea Hawaii where through this forum arranged to meet HiloDon and the team... A truly Mind Blowing experience with views we can only dream of based here in the UK. Very difficult to make out the constellations the sky is so full of stars, and almost straight from sunset One of the things you realise is that many of the Messier objects are visible there with the naked eye. I've also been to Sark where the stars looks like diamonds so bright against the dark night sky backdrop Why this story then? Well I wanted to share the feeling of an amatuer observer in that even if you fall off the observing wagon for months or even years, it's just as magical as it was in the beginning when you get back behind the Eye Piece! and people like Nick are always there willing to share their knowledge skills and coffee Having just moved to a house with a garden before lock down I made the effort to visit Nick and receive some Astro inspiration! Following my reintroduction - I set up the other night and enjoyed the planets and a few old favorites through the Equinox Pro... The Astro kit I researched for ages on and bought is still amazing gear for which I am really blessed... I think I will have to pave a square of the lawn for a new observing pitch, but how exciting and lucky am I to be Back behind the eyepiece... Cheers Nick...
  6. 8 points
    Another quick session with my new 102ED-R mounted the altaz SkyTee2 and my second attempt at a sketch of Mars. I found #12 filter helped to improve contrast a little....possibly. The rough sketch was from around 30 minutes of observing with Mars at an altitude of 35 - 40 degrees. I think with a driven mount and more time I would have been able to tease out a lot more detail. I've rotated the sketch to compare against a map from Mars Mapper - I can see a vague similarity between the two! Magnification was upto x200. I think the 'notch' in my sketch is the area between Sinus Margaritifer and Sinus Meridiani. These sketches are certainly making me learn the features of Mars but I am finding it quite difficult to find a Map which allows me to clearly identify them. I am also finding the naming conventions for features a bit counterintuitive (eg: unlike the moon, a sinus does not look like a 'bay' at all to me) and the names are slightly different on different maps. Also it's not always clear whether the feature label is referring to the bright feature or the dark feature. I've read a lot of resources on observing Mars, but still no clearer to a solution, although Mars Mapper is probably the best I've come accross so far.
  7. 8 points
    Windy conditions here last night Mars was up & down like a ping pong ball this being the best of the bunch! C9 skyris 236M - x1.8 amplification! Image resampled at 140% Thanks for looking.
  8. 8 points
    So having bemoaned the lack of clarity on Mars lately and seeking a magic bullet filter to rectify this, the atmospherics parted and revealed a wonderful amount of detail on the red planet tonight. I spent a good few hours on Mars alone tonight, trying out various eps and filters and my ADC settings. Starting at about 11pm I think, the adc was very much needed but the clarity and steadiness of the atmosphere here were immediately obvious. I started as usual with the baader neodymium filter and kept with that mostly but also tried the mars b and no filters. I’m starting to think that seeing is all and the filters don’t really add much at all really! though the neo did noticeably dim the diffraction spikes and darken the background a bit. I could have/ should have stayed much longer the view was so good! By 2am Mars was at its highest or close to and the adc wasn’t really needed further so out it came. I abandoned the neo too and I think the final views with naked ep (7mm i think- 230x) were ultimately the best. I don’t know if I really saw it but there were 2 thin dark fingers protruding from the main southern dark region and looking at SS, could the lower one (dob view) be Valles Marineris? That would be very cool as it has to be the most intriguing feature on the planet- visually at least- a huge series of canyons that look like an excavation or crash landing site from something really huge! Mark
  9. 7 points
    I managed to capture this image of Mars on the 19.09.20. The conditions were very windy with low fast moving cloud. The histogram was dancing all over the place. Excuses excuses. C11 Asi290mm Baader Rgb filters As2 Astroart5 Cs6
  10. 6 points
    Just to add to this, I added two panels to these images last night to create a four panel mosaic of the Cygnus Loop. I processed this with a slightly different flow (starless processing then star mask blended afterwards). I much prefer the result! Here is my basic workflow: - For each of the four panels, Raw files loaded, calibrated and integrated in APP using the algorithms "Ha-OIII extract Ha" and "Ha-OIII extract OIII". Autostretched images (1 x Ha and 1 x OIII) saved as 16 bit TIFF files - For each of the four panels, Ha and OIII extracted TIFFs combined using Astronomy tools action set action - "Construct RGB image from channel files". Ha assigned to Red, OIII assigned to blue and green (HOO palette) - Mosaic from panels created using Microsoft ICE - Mosaic loaded In PS, manual creation of star mask in PS for later blending onto Starless image - Starnet++ on original mosaic image to remove stars - Curve stretch/levels in PS on starless image - Noise reduction on starless image - Saturation and vibrance to preference - Blended star mask from earlier onto starless image, 90% opacity
  11. 6 points
    The biggest thing that determined my astronomical career was not being able to afford to buy a telescope. This forced me to make my own, eventually proving so interesting and successful that it became my business and way of life. Would I change much if starting again? NO!
  12. 5 points
    Adding data to vdb141 whilst trying to block my next door neighbors kitchen light.
  13. 5 points
    This is my first attempt imaging M31, with a Canon 600d, tripod, and a cheap old pentax 40-80mm lens I picked up on ebay for £15. I took 300 light frames, 3 second exposures at an iso of 3200. I also took 100 dark frames and about 50 bias. Stacked in DSS and edited in GIMP. This is my first attempt at astrophotography and also at using software such as GIMP, so it's a steep learning curve. I plan on getting a star tracker eventually, but wanted to see what I could achieve with this simple set up first. I understand that it's nowhere near as impressive as most images posted on here, but I'm quite happy with it as a first attempt, considering the obvious limitations of my equipment. Any constructive criticism would be welcome, as I don't really have an idea what I'm doing when it comes to post-processing.
  14. 5 points
    Ready for Mars later, some AZGTi fiddling and eyepiece comparisons... Cadet's corner. A small paved area with a path leading to it for those muddy winter nights. Oversize fencing to the west blocking out the LED street light and home made tarp light shield to the north blocking a neighbour's laser beam security lights ..
  15. 5 points
    Apparently I take a lot of photos on holiday I then don't bother processing. Taken in 2015, but only processed in the last couple of weeks (thanks to no vacation abroad due to Covid). The Milky Way setting over Benguerra Island in Mozambique. Almost all dinners are served on the beach and that night the staff set up all the tables in line and I thought it would make a good shot. I ran back to the villa and grabbed my camera. Composite of two images. Foreground was a 2 sec exposure at ISO 800. The nightsky was 25 seconds at ISO5000. I actually think I pushed the ISO too much on this holiday and have only used 3200 ever since, as it came out a bit grainy. Using an un-modified Canon 70D and Canon 14mm L lens at f/2.8 (effective 22mm due to crop sensor).
  16. 5 points
    Had a go at Pleiades... still leaning With Skywatcher 72ED, Sony A7II on a skywatcher AZ GTI in EQ mode. 15 x 4 min subs. I did have a generic Sky watcher light pollution filter on, but have a feeling I lost data due to that... only my second real attempt at long exposures like this though. I feel I have over processed, but seems a difficult subject due to the bright stars in the middle and still getting my head around PS. Autosave.tif
  17. 5 points
    So I finally got my Vixen SXP rig set up the way I want - literally 10 minute set up time. This is 6 hours and 45 minutes integration of 81 X 5 minute subs taken with a Canon EOS Ra through a Tak Sky 90 on a Vixen SXP with an OPT Triad filter last night. All processing in PixInsight. Comments / criticisms welcome. Barry PS - my first ever automated meridian flip on APT while I slept! Good times.
  18. 5 points
    While struggling to sort out spacing and tilt issues I might as well gather some data while testing This was captured during this week since we had several clear nights. Bubble nebula (NGC 7635) and Lobster Claw nebula (SH 2-157) with the ZWO ASI1600MM-Cool and TS Photoline 80 f/6 with 0.79x reducer/flattener. 78*5 min Baader 8nm S2 73*5 min Astrodon 3nm O3 70*5 min Astrodon 3nm Ha
  19. 5 points
    It is 5 years since I captured data for the Heart Nebula. Starting afresh....and happy with the 1st 3 hours of Ha data that has come in. (It will take some time to finish this as the forecast (cloud cover) is bad for some days to come).
  20. 5 points
    Got 3.5 more hours of data on M27 last night, and the GP mount was tracking like never before. Just stacking these 12840 s of data from the Meade SN6, with ASI183MC and Optolong L-eNhance filter got me this Combining this with the previous 5 hours of data from the same combo got me this: And mixing this with just under 2 h of data with the 80mm and same camera and filter gets me this: Hopefully, I can add more in the coming two nights, to get even more signal in the outer shells. I might also want to do some unsharp masking to prevent blowing out the centre
  21. 5 points
    Managed to get a few more subs last night before clouds moved in. I've tried to process a little more neutrally as well the original a little too warm. Uncrpped, no noise reduction routines (for the pixel peepers). Hope you like..
  22. 4 points
    I went on a mission last night to try the Propeller nebula and after a half hour of failed attempts I decided to go elsewhere. While the IC1318 complex was nice the scope nudged down a bit for a look. The sky was really good with the Milky Way sharply defined and the "hole" (dust) between the Cygnus spur and Cass was readily apparent. It is just off Cass and big. The Crescent offered very nice structure in the 15"/ TV OIII and Nebustar II, 21E- these are very nice filters. After wandering around aimlessly following faint nebula in this area I figured a revisiting the to Little Veil was in order. Not to be fooled by that deceptive very nice chain of stars on the wrong side of the guide star I honed in on the Little Veil, showing as a nice ghost of a streak as always and not thst small in the 1828 fl scope. Very satisfying indeed. During the trip from the Crescent to the Little Veil I stumbled on a nicely defined patch of nebulosity-hmmm did I see this before? Can't remember, so we'll call the Tulip neb a new to me observation. Listed as SH2-101 this neb showed defined maybe oblongish in the 21E and was not hard to see in either the OIII or UHC, the nod might go to the UHC, more testing required and I'll visit often. One more thing- when observing the Little Veil SH2-91 I noticed a very faint streak of nebulosity "above" the main one- and I mean faint. I do believe this is another part of the nebula and this was very satifying to see, I've noticed more nebulosity in the area before but this was a great view of the feature and distinct (very very faintly distinct). This 15" has sure served me well, giving thousands of observations and still going strong, eventhough the Moonlight is now creaking lol!
  23. 4 points
    18th and 19th September 2020 Manchester Hi guys, these are my latest and best photographs to date. I am very new to imaging (acquired my first mount and scope in May this year and shot my first DSO in June). I am happy with the Eastern Veil Nebula but struggled with processing the Western Veil and Pickering's Triangle - in particular, I would like feedback on this photograph (struggle with star control). Thanks Rik Equipment: - Skywatcher HEQ5-pro (Rowan Belt Mod) - Canon 800d (modded) - Skywatcher Evostar 80ED - Altair Lightwave 0.8x focal reducer/field flattener - ZWO ASI-120MM-mini guide camera - SW 9x50 finderscope - 2 inch mounted Optolong L-eNhance Acquisition: - Sharpcap polar alignment, ST4 autoguiding with PHD2 - Manual acquisition using intervalometer - Lights - Western: 20 x 360s (2 hours) - Lights - Eastern: 32 x 360 (3 hours 12 minutes) - Darks – 20 - Bias – 30 - Flats - 30 Processing: - Raw files loaded, calibrated and integrated in APP using the algorithms "Ha-OIII extract Ha" and "Ha-OIII extract OIII". Autostretched images (1 x Ha and 1 x OIII) saved as 16 bit TIFF files - Ha and OIII extracted TIFFs combined using Astronomy tools action set action - "Construct RGB image from channel files". Ha assigned to Red, OIII assigned to blue and green (HOO palette) - Crop - Further mild stretch of data using levels/curves - S curve to increase contrast between dark sky and DSO · Very Aggressive star reduction using star mask and Astronomy tools action set "Make stars smaller" – I think I ran the action at least 8 times - Colormancer plugin noise reduction - A little sharpening using Unsharp mask in PS - Saturation and vibrance to preference - Watermark added
  24. 4 points
    Hello I am trying to find ways to observe more detail on Mars. I am observing him between 35 degrees and 50 degress altitude. He is SOOOO bright that the intensity of the light is washing out any surface detail. I can just about make out the Southern polar cap and can see (just) some surface shapes but it's the brightness of the planet that is (ironically) the issue. I do have some colour filters which I can use over the eyepiece. Any tips for which colour is best, please? I have tried observing with various magnification, ranging from 8mm to 32mm. My focal length is 2800mm and focal ratio F10, (CPC1100) Any tips /advice / help all glady welcomed, thank you. Bonus - tonight I got to see Uranus, looking like a little light blue / green ice ball and a transit of Ganymede's shadow on Jupiter! Very cool. Siouxsie
  25. 4 points
    Starting to take shape
  26. 4 points
    Tonight's clear skies seemed to be threatened by some mist arriving at 10pm. I had to make a quick DIY dew shield in a proper Blue Peter fashion, as the air was so damp. But this was the first clear night in what seemed ages, so I didn't want to miss anything. Started with Albireo for a change. Then Epsilon Lyrae: I split it at 86x, so the seeing was good. After @IB20's report, I thought I'd try and find the Blue Snowball as I hadn't observed that since this spring. It was nice and bright and easy to see. Unlike M56 - this cluster was very faint; the southern light pollution from my garden made worse by the moisture in the air. So seeing was good but transparency wasn't. Checked M27 the Dumbbell nebula and it was pretty faint too. So - on to the main event. Shifted the dob to the bottom of the garden and set up for Mars. I was hoping that the still and damp air meant that the planetary seeing was going to be good, and it was. I could get up to x350 with some detail still clear, but that was pushing it a little too much. 227x was perfect and I settled down for an hour sketching. When I was happy, I had a quick scan around and had a peek at the Pleiades. Then remembered Neptune from the other report. Unfortunately it was obscured by tree branches and I didn't fancy moving the scope again. Next time I'll try and find it a little earlier. But Uranus was in the area, so I star-hopped from Menkar in Cetus and found it. This was the first time I have ever seen it - a pale blue/grey disk at 150x (little fist-pump moment). I am looking forward to the rude puns around the breakfast table tomorrow.
  27. 4 points
    Initially I though this was too close to the pole for me to see due to buildings but turns out it just clears the neighbours house roof so I spent a while on it last night. As always needs more subs. Just the head end shot and processed in PI and PS. Looks like Sat/Sun will be the next chance for more data. No calibration frames yet. Thanks for looking RASA 8, ASi533 (unity), CEM60, Baader UV/IR cut filter.
  28. 4 points
    This lovely item was delivered yesterday, so the clouds rolled in last night of course, but been perusing various posts on here and websites about learning to use it, I've got a copy of making every photon count on order to compliment it, looking forward to some nice images of Dso's and nightscapes with it, well hopefully. Clear skies
  29. 4 points
    And here is the final image including flats. Made the image a little cooler overall also.
  30. 4 points
    Everyone has ran out of spending money, been caught by their wife and nobody has anything left in stock anyway
  31. 4 points
    Mars tonight with better seeing. C11. Image not derotated. 90sec pr. channel.
  32. 4 points
    Thanks for the help people. Had my first go at this over the weekend and am happy with it as a start! Will have another go some other time and play around with exposure times to see if I can find a good balance!
  33. 3 points
    Photo is not new but, a nice image regardless.
  34. 3 points
    Hi all, here's my latest effort in SHO drizzled. Total integration was 27 x 600s Ha 17 x 600s Oiii 19 x 600s Sii Processed in PI. Also added a large Tiff and a starless image for those that like them. Fossil_SHO.tif
  35. 3 points
    We had some friends over and once dark I set up my scope to show them a few objects. Jupiter, Saturn, M57 and M13. The kids (5 to 7) enjoyed seeing through the telescope once they learned not to touch it while looking into tge eyepiece. This was without letting the scope cool down, while changing eyepieces I was surprised to see the hot air swirling in the de focused mirror. Later on, I set up the scope with Skysafari and went for some more objects: the double cluster in Perseus, Pleiades, Cats Eye nebula, M13 again, failed to see the Veil nebula, and M31 on request of my friend although it’s still just a fuzzy blob. Aftee the scope had been outside 2 hours and friends left I tried mars again before packing up. By this time my secondary had misted up and .. wow! Much better results with Mars. I could now see the polar ice cap and make out features on the surface. After months of permacloud I am really enjoying getting some use out of this scope. Ian
  36. 3 points
    Beautiful clear and warm night here in Auld Reekie so decided to get the whole kit out for first use in a while. A few issues along the way; couldn’t find the cable for the encoders on my Nexus DSC so had to go manual and just sweep around the sky. Had the kit attached to my televue 55mm with the 67mm conversion lens. I found to get this in focus the eyepiece had to be pulled around 3/4” out of the base of the feathertouch focuser which didn’t feel particularly secure. Not sure if this is right and I need a riser? Also, I really struggled getting the TNV14- eyepiece adapter tight without starting to unscrew parts of the eyepiece. Must be doing something wrong there. On to the positives, the views handheld were fantastic from a light polluted back garden. Lots of stars, satellites and the odd shooting star. Keen to get a x3 lens for this (any recommendations?). When I got the kit set up in the dob (no filters) I was sweeping the sky and stumbled across the M13. Took my breath away and the family, who came to see. Incredibly clear seeing individual stars with no averted gaze. Quickly swapped to my Binotron and 32mm plossl to compare and all you could see was a very faint fuzz ball. By the way, the 32mm with the Binotron were not good at all and I’ll be sticking to the 24mm panoptic. Switched very briefly to the Antlia 3.5 filter again with the 55mm plossl in the dob. Quite a bit of scintillation. Swept around the North American nebula area. Picked something up but not particularly clear. Looking forward to trying the Astronomik 642 filter next time. So a bit hit and miss but I won’t forget seeing M13 in all it’s glory for the first time and most issues down to me learning how to use the new kit rather than the kit itself.
  37. 3 points
    Imaged over two nights 13/17-09-2020 Luminance of 16 x 600 un binned RGB of 7 x 300 each binned 2 x 2 WO 90 scope QHY9m camera
  38. 3 points
    Hi all, been lurking here for a few weeks reading up on the various observatory and camera builds. Always been interested in astronomy but never had the time, money or space to do anything about it, so been quite interesting watching you all building things! I'd been wanting to build my All Sky Camera for a while after seeing some star trail and timelapse footage, so have been reading up and collecting parts. Finally finished it yesterday/today, so thought I'd put together what I have done. I have a Raspberry Pi 3b connected to a WD Green SSD running Thomas Jacquin's All Sky software (https://github.com/thomasjacquin/allsky), with the HQ Camera support that Rob Musquetier added. Its housed in a large weather proof* enclosure, under a 4" dome. The dome is heated with a Dew Heater from AllSky Optics, which is controlled via a relay that the Pi is controlling. The dome, enclosure and outside air temp are monitored by 1-wire DS18B20 sensors, and the whole thing is powered via POE, with a 12v to 5v convertor powering the Pi. Preparing the cover for the done fixing holes, the camera hole, the camera fixing screws, the heater cables and the DS18B20 sensor. Gasket cut from 1mm gasket sheet. Test fit-up with the gasket in position, inner ring of black sticky back felt, dew heater, final ring of black felt. The exposed plastic from the camera hole was also coloured black with a Sharpie. I wasn't sure about painting the dew heater or not, but from the test footage I did last night, it doesn't look necessary for now, so I will leave it. Dew heater and DS18B20 fitted. Everything fitted internally. WD Green SSD & Pi3b is installed in an old 6x6 WD case, minus the cover. The POE splitter is at the top, with the power cables running from a 2.1mm DC jack-to-terminal connector, into some 3-way Wago blocks. 1 wire from the 3-ways, go to the CPT 12v to 5v converter, which goes to 2 more 2-way Wago blocks, then off to the Pi3b via modified USB cable. The other connections on the 3-way's go to the dew heater (ground) and the relay (12v). The relay control is then wired to the GPIO header on the Pi3b. Lastly, the DS18B20's are connected to a small stripboard with the 4.7K resistor (in the small black box at the bottom), which is then connected to the GPIO headers. And the finished unit. I used it last night and didn't turn on the dew heater until I saw some dew forming, and very pleased to say it cleared it very quickly. I left it on all night and it maxed out at ~23c in the dome. Unfortunately we do have a really annoying street light on the right, which is giving the red glow all over the photo, but it is only temporarily thrown on the utility room roof, so I hope to move it further into the garden and the houses along the side should hide the light (although then introduce their own, but hopefully they will not be on all night! Shopping List - I know I always appreciate it when people provide links to the parts they used, so mine are below: Gasket Sheet: https://www.amazon.co.uk/gp/product/B00FEIP2HY Relay: https://www.amazon.co.uk/gp/product/B07V1YQQGL DC Power Jack to Terminal Connectors: https://www.amazon.co.uk/gp/product/B07RHM5KCW 12V POE Splitters: https://www.amazon.co.uk/gp/product/B078JNVRTR Outdoor Enclosure: https://www.amazon.co.uk/gp/product/B0151KNMB2 (*note: the seal is crappy foam and ripped in two when I went to remove it (ironically to protect it), so not sure I trust it in the rain, yet!) 4" Dome: https://www.amazon.co.uk/gp/product/B01N29BQN6 Fisheye lens: https://www.amazon.co.uk/gp/product/B01CX4U7DK/ Waterproof DS18B20 Sensors: https://www.amazon.co.uk/gp/product/B07DNWX5LB Wago Blocks: https://www.amazon.co.uk/gp/product/B07QBC9DKS Pi HQ Camera: https://thepihut.com/products/raspberry-pi-high-quality-camera-module Dew Heater: https://www.allskyoptics.com/store/product/allsky-camera-dew-heater-module 12v to 5v Converter: https://www.allskyoptics.com/store/product/dc-to-dc-converter-regulator-12v-to-5v-3a-15w-power-supply SSD and Pi3B were ones I already had, but easy enough to locate from usual outlets. I think that is more or less all the main things! Thanks for reading!
  39. 3 points
    SH2-115 Introduction Having successfully captured a detailed colour image of SH2-112, I wanted to try its near neighbour SH2-115 but this object is much dimmer and it has proved to be quite difficult to capture any deep data. However, it is also an object that proves the old adage ‘there’s no substitute for lots of subs’!! Current poor skies have hampered this endeavour but over four nights of cloud-dodging between 12th and 17th September I managed to collect 17.5 hours of Ha data to produce this mono image. Unusually, I had to process the data in two totally different ways to achieve the result that I wanted and this is the version that I have settled on. Description SH2-115 is located about 7,500 light years away in the constellation of Cygnus about 2° north-west of mag. +1.25 Deneb. The emissions that allow us to observe this beautiful nebula are driven by the energy from a cluster of stars known as Berkeley 90 whose stellar winds are responsible for sculpting away much of the original dust that originally inhabited this region. Image Stats Mount: Mesu 200 Telescope: Sky-Watcher Esprit 150 Flattener: Sky-Watcher Esprit specific Camera: QSI 683 WSG-8 Filters: Astrodon 3nm Ha Subframes: 35 x 1800 sec Ha Total Integration: 17.5 hours Control: CCD Commander Capture: MaxIm DL Calibration, Stacking and Deconvolution: PixInsight Post-Processing: PhotoShop PS3 Location Constellation Cygnus RA 20° 35' 12.0" DEC +46° 52' 39.0" Distance ~7500ly
  40. 3 points
    We had a nice clear night up here yesterday and, now I've got used too APT, EQDIR, CdC & PHD2 and getting them all working together, I had a few hours in the garden. I wanted to go for M101 so set up and got 20 x 5 minute lights, then ditched one as there was a nice satellite running rough through the centre. Unfortunately, although I had a dew heater on the scope it wasn't turned up high enough and I only noticed the light dew in the centre of the lens at exposure 17, so the focus is a bit out and I don't know how many were effected, but I stacked them and did the best I could. Camera: Canon EOS 2000D @ 1600 ISO Scope: SW Evostar 100ED (no flattener this evening) Mount: SW EQ5 Guiding: Celestron 9x50 finder with ZWO ASI 120MM Mini After taking the darks and bias images, it was still good so I went for 5x 5 minute exposures at M45, just to see what I could get, and for 5 images stacked with the same dark, bias & flats, it hasn't come out too bad. Lastly, on the 18th Sept, I had a go at the North American Nebula with my un-modded Canon EOS 2000D as an experiment, just to see how much nebulosity it would capture. This is 10x 5 minute & 2x 10 minute exposures at 1600 ISO, stacked in DSS and processed in Photoshop CS3. The next purchase will be a dedicated astro camera! Hopefully I can get some more it tonight. Thanks for looking.
  41. 3 points
    My first try at guiding with AsiAir and a new scope. Camera not well matched so think I'm well beyond the limits, but wanted to try things out while I wait for a new camera. Soft focus style Skywatcher 100ed - Bressher HD camera - Asiair guided - 60 x 3 minutes - Siril stack - Pixinsight fiddle
  42. 3 points
    The Iris Nebula. 18 hours in total over several nights. Processing in PI. I used John Rista's NR techniques and applied some slight deconvolution. I also de-emphasised the stars using the method detailed by Adam Block. I processed the nebula separately using Starnet in PI an deliberately didn't over saturate the stars. Finally I went back and slightly darkened the background. Hope you like it, comments and criticism welcomed. https://astrob.in/b6esyw/B/
  43. 3 points
    Just a 2” polarizing filter. For the new Lacerta wedge ordered from 365astronomy last Tuesday. Still waiting for it to be shipped but due to staff shortages Zoltan is running way behiind in shipping.
  44. 3 points
    It's worth noting that CUDA is an NVidia proprietary/only technology, so anything that specifically requires CUDA will not run on AMD cards. Writing and particularly optimizing for GPUs has been an incredibly interesting experience. Much of what you know about optimisation for general purpose computing does not apply, while new considerations come to the fore. Some things just don't work that well on GPUs (e.g. anything that relies heavily on logic or branching). E.g. a simple general purpose median filter shows disappointing performance (some special cases not withstanding), whereas complex noise evolution estimation throughout a processing chain flies! I was particularly blown away with how incredibly fast deconvolution becomes when using the GPU; convolution and regularisation thereof is where GPUs undeniably shine. My jaw dropped when I saw previews update in real-time on a 2080 Super Mobile! I don't think APP uses the GPU for offloading arithmetic yet by the way. Full GPU acceleration for AP is all still rather new. GPU proliferation (whether discrete or integrated in the CPU) has just about become mainstream and mature. Hence giving it another look for StarTools. Exciting times ahead!
  45. 3 points
    Hi Guys, Here is a mosaic taken by separate captures on the morning of the 14th September. I managed to capture the tiny moons Phobos and Diemos,- (just 12km diameter). I autoguided on the planet using PHD2 using a separate 20 second exposure, and combined the images in layers using Gimp. Details of equipment is on the image. Best Wishes Harvey
  46. 3 points
    I recently put up my latest image on my blog, a stab at Sh2-115. One of my acquaintances showed it to her astronomy-mad granddaughter, who thought it looked like a horned troll, trying to grab the star cluster in front of it with two massive paws... I think she has a point, don't you...?
  47. 3 points
    I decided to grab the camera for a few shots around and inside the dome as I was heading to bed after midnight last night.
  48. 3 points
    A short time lapse from last night, here's the 130PDS doing its thing...... 130 PDS under the stars.mp4
  49. 3 points
    I don't think I'd start again, I would probably take up something less stressful , like amateur bomb disposal.
  50. 2 points
    First time I have shot with my ha filter and tried to add it to my rgb image so not going to jump up and down about this one as i feel it needs a lot more data but this is around 3 hours of Ha/rgb on ngc7635 (the bubble nebula) 24x 5 min rgb subs 10x 5 min ha subs 10x dark flats and bias was all taken in my backgarden astroback yard style Gear used Heq5 pro with belt upgrade Skywatcher 130pds 90x50 guide scope with zwo 120mc Canon 450d modded Stacked in deep sky stacker and edited in photoshop let me no what you guys think .
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