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Showing content with the highest reputation on 31/03/19 in all areas

  1. 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
    20 points
  2. 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 st
    16 points
  3. NGC4747 and 4725 in LRGB Grabbed this pair of galaxies 4x600s in each LRGB. I need to get some fresh flats and do some longer subs to get the full extension of the galaxies. Imaged from my garden with my AG12 and H35. Also caught the ISS flying over too while imaging on the Observatory Cam. Thanks for looking. iss pass over.mp4
    13 points
  4. After a week of missing out on clear skiers due to work commitments I was looking forward to an astro meet up on Friday night but that also got beaten by other commitments. Although I couldn't leave home I could still have a go in my light polluted back garden so I rang my dad who came over for some observing and put the VX14 out to cool down. I didn't set up the equatorial platform as that means the need for a small step for zenith viewing which would not be a safe idea for my dad. We had a look at Interstellarium and the Cambridge Double Star atlases to come up with a plan. My back gard
    13 points
  5. Hello. =] I captured some luminance data on M81 during last crescent moon, but didn't manage to get any rgb data until a couple of days ago. I reworked a much softer version of the luminance as previous attempt was heavily overcooked. I'm not sure if I've still been a little heavy handed with the luminance processing. Also found it quite difficult to arrive at a final luminosity and saturation I could feel happy with. For a first attempt at LRGB processing, I'm very pleased with this result. I'm sure there's lots of room for improvement however! I stacked; 9x900s lum
    11 points
  6. A quick trip after work on Thursday to Talacre North Wale to do a reccy more than anything. While i was there i set up the camera and let if running for a bit. 20 x 2.5 mins ISO 500 F6.3 Sony A7RII ZEISS 24-70mm Talacre Trails by Danny Kenealy, on Flickr
    6 points
  7. Last nights effort,very basic as i only have gimp and very basic processing knowledge,but my wife likes it so that good for me..lol.
    6 points
  8. Hi. Located in Coma Berenices NGC4565 is a fine example of an edge on Galaxy. This was taken using a ED 72 with a x0.8 reducer. Subs were 18 Lum of 600 secs each. RGB were 6x600 secs each. Calibrated with Bias and Flat frames. Minimal processing was done in Photo-shop. Mick.
    6 points
  9. Hi, finally starting to get my mount working again and shot a night of Luminance on M66 and M65. After flats calibration I am getting a weird halo but I think I know whats causing it. Anyway here is M65 with M66 and 34x300sec exposures. Cheers Paul
    6 points
  10. 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.
    5 points
  11. Took the dogs out at 3:00 am to find the sky clear, Jupiter rising behind Scorpio. Off to the East, Saturn was making its appearance as well. Took my babies back in, made my coffee and told myself I'd take an hour for the two planets to get a little higher. Carrying out the camera and eyepieces, I decided to do a little wide field of Jupiter with Scorpio while I visually observed. I could make out the bands of Jupiter well and the four large moons were clearly visible 3 to one side, 1 to the other. When I went to get my camera, I saw that the Milky Way was faintly visible,
    5 points
  12. From SVBONY. "A brand new full cloud filter from Polar Foil Filters, will be shortly available in 1.25" and 2" sizes. This breakthrough will allow observing through cloud cover to give views. A combination of rare earth metals reacts with uv light through clouds ,to produce an image . By filtering out the wavelengths of scattered light it will allow bright and razor sharp views of the night sky. Even under light polluted sky it cancels the bright glow caused by humidity .Can also be used for solar with the correct equipment. In response to increasing demand for superlative
    4 points
  13. 4 points
  14. I have been waiting for clear skies in the late evening to gather further subs on another Gnomus/Wilson galactic collaboration designed to make the most of our focal lengths and imaging scales and the vageries of the UK winter . . . watch this space. However, opportunistically, I've managed over several nights to grab subs here and there in short cloud-free gaps in the early evening of M81 and M82 before being inundated with thick all covering cloud. I've captured 8.5 hours of LRGB all at 600s at the native FL of my WO FLT132 giving me 1.2"/px with my QSI683 enough to give some detail an
    4 points
  15. My Hickson journey continues, fascinating tour of the sky. Hickson 64, located in Virgo Name Mag approx Type class PGC 46975 a 15.5 elliptical SBc PGC 46972 b 16.7 spiral Scd PGC 46977 c 15.6 spiral Sd PGC 46971 d 17.8 spiral
    4 points
  16. Quite often newcomers to astronomy ask members of SGL what is their best choice of eyepiece once they have decided they want to move on from any particular EP that came with their 'scope. Sometimes the answers are quite technical and not readily understandable to a newcomer. This article posted in Cosmic Pursuits today makes valuable and lucid reading and may answer a lot of questions already in the minds of some members. https://agenaastro.com/choosing-eyepieces-for-your-telescope.html Had I been able to read this article a few years ago I might have saved myself a lot of disa
    4 points
  17. I've decided to sell my wonderful Epsilon 130. I've owned it for just over a year and produced many images with it. I'm selling as i've decided to go a slightly different route and get something with a longer focal length. Here are some examples of what this wonderful instrument is capable of. In fact in the right hands it's capable of much more as i've only really used it with a OSC camera. I'll be selling with Custom made aluminium tube rings and the Takahashi collimating tube and collimating eyepiece. Also included is a TS Optics dew shield and TS Optics Dovetail. It's in pri
    3 points
  18. Finally a clear sky all night.and no gremlins with guiding ect. 19x500 sec subs,flats and bias.DSS and Gimp.
    3 points
  19. Hi all, Well this image is a special one for me as it's my first image of a galaxy. Well, a few months ago I did image Bodes and Cigar but there was a problem with the stack and banding issues. So this one is my first proper galaxy ; the Pinwheel Galaxy. 5 hours and 40 minutes worth of imaging, 240 second exposures at ISO 400. Canon 80D, Zenithstar 73, HEQ5 Pro Rowan Belt Modded, Starwave 50mm guidescope, ZWO 120MM. I may add to it but I'm not sure how much more data I could reasonably get and what kind of improvement, as I am probably limited by my bortle 6 skies.
    3 points
  20. An amazing video about the New Horizon spacecraft and its flypast of Pluto and Ultima Thule. It contains loads of information I didn't know. Pluto & Ultima Thule Documentary
    3 points
  21. Here's my go. Santa bought me a ZWO ASI1600MM-PRO. Last night was the second time I was able to get out an play with my new toy. Here's what I've managed to get from an hours worth of data in Bortle 8 sky. I'm not sure why there's so much vignetting. Still gotta start somewhere
    3 points
  22. As the title suggests, it's not very often that I get the opportunity to got to my dark site at the same time as there is no moon about and it isn't cloudy. It all came together perfectly on Friday 29th. Car all packed early as I was able to get away from work mid afternoon. Arrived dark site (Bortle 3) around 18:45, set up, checked collimation, it would need a tweak before astronomical darkness but left it to reach equilibrium first. By 8pm and a few cups of tea I was ready to go so popped in the ES24 giving me x68 mag. M42/M78 - (default) . Never fails to astound me, the trapezium
    3 points
  23. Stop it! this one is from my "Best of" Album usually it is even worse
    3 points
  24. The April edition of the Binocular Sky Newsletter is ready. As well as the usual overview of DSOs, variable and double stars, this month we have: The Realm of the Galaxies well placed for evening observers Asteroid 2 (Pallas) available for small binoculars Review of Bill Cook's new book on binocular collimation Several lunar occultations I hope it helps you to get the best out of these shorter (but slightly warmer) spring nights. To pick up your free copy, just head over to http://binocularsky.com and click on the Newsletter tab. You can also subscribe (
    3 points
  25. As open clusters go NGC 2281 doesn't have much to shout about when comparing it to the Beehive Cluster or Pleaides and appears not to be a common target for Astrophotographers. However, what it does have is a name which accurately depicts what you see. It's a bit of a magic eye moment, but stare at the bright star in the centre of the frame. This is the 'point' of the heart which sits above it. 20 light frames of 100 s each. 15 dark frames, 25 flat and bias frames. Taken with a William Optics Z61, ZWO ASI294MC Pro Cooled set at -15 degrees and unity gain all atop a Cel
    3 points
  26. Yep, when you consider its practically a 5" ED in a very compact form, its been very versatile scope, had it on an AZ goto mount for a while picking out fuzzies, but now its main use is Luna imaging with the cannon 1000D, hence why i sold my Antares ortho`s, just not being used no more. I will go on record to say , if i replace it then it will be with another 127 skymax, but that will only happen if my one had an accident or such like. Cool down is not an issue as it lives in an outbuilding so is ready to go into action when needed, great scope very pleased with it
    3 points
  27. very fin cloud here but the proms are showing ok through it . yesterday was prom free so its good to see a bit of action today. kit starwave 102 f11, quark, asi120mc. hope yoy all have clear. thanks for looking. charl. proms upper oncoming limb. faint. prom upper off going limb showing well, that's all folks.
    2 points
  28. I'm currently working my way through the 27 Arps in Leo. I managed to observe 9 last night (2 were in pairs in the same field) and I'd hoped to continue tonight but it is far too windy for my unprotected scope... My approach with the Arps is to point the scope and see what comes along. Some can be quite underwhelming, but they're always interesting in their own subtle way. I had no idea what to expect with Arp 174 but it turned out to be one of the most fascinating so far. At first there was little to see except an uneven pair of galaxies but after a couple of minutes I noticed a long tai
    2 points
  29. Ive tried this so many times during my painstaking course of AP. Tonight I decided to have last go at The Rosette before the clocks change and it goes behind the garage until next year. Anyway its far from the best result id been chasing but nevertheless heres my attempt. 42 mins of subs with darks bias etc Comments very welcome Cheers Clears Skies Stu ?
    2 points
  30. I have been following the discussions regards small pixel CMOS cameras and refractors for imaging galaxies, I decided to give it a go. I have a 106mm APO that I normally use with a 0.75X Reducer and F/F, however for this image I took that FR/FF off so I imaged at native 690mm, F6.5. The camera is ASI1600 with 3.8um square pixels. The image is a center crop from the Full Frame - it is 5.7hrs of exposure made up of 2.7hrs LUM and 1hr each for RGB all using 120s subs. I used AstroPixelProcessor to integrate the subs, Registar to register and combine RGB and Photoshop to stretch and used Astr
    2 points
  31. Really interesting to see what a raw uncalibrated sub looks like with that gear, so thanks for sharing that Peter! And in actual fact, it makes the final result all the more impressive! Sorry if we're getting a bit off-topic now - but i see your camera has biiiiig pixels. So you're getting loads of photons from your scope, and then you have these big pixel wells, which i assume explains why your stars always look so good (processing aside of course!). The norm these days seems to be CMOS cameras with smaller and smaller pixels (which i think is ok if you have a smaller FL scope) but i see
    2 points
  32. Yesterday was spent outside in the sun dealing with other domestic chores, but the sudden drop in temperature today meant no-one else wanted to be outdoors for any longer than they absolutely had to be, so I gathered up some 4x2 with a couple of offcuts of 6x2 and 8x2 to make up a frame for the external observatory door (a frame for the door, rather than a door frame . I used the 4x2 to make the stiles and top rail, the 8x2 for the middle rail and the 6x2 for the bottom rail. Much as I'd have loved to join them all using dowelled mortise and tenon joints, it would have taken an age, so I jus
    2 points
  33. So, I have a 200mm M42 fit lens. I was wondering if I could use it along with my GP Cam for some imaging. So I printed the blue bits seen here. Anyone else doing anything similar?? Thought I may be able to use it on my Star Adventurer?? Thanks for looking.
    2 points
  34. LRGB 46 x Luminance @ 150s 13 x RGB @ 150s Each Processing with DSS 4 and Photoshop Cs2 Imaging telescope or lens:Altair Astro Lightwave 66ED-R Imaging camera:ZWO ASI183MM Monochrome 4/3" CMOS USB3.0 Deep Sky Imager Camera Mount:Skywatcher EQ6-R PRO Synscan Guiding cameras:Skywatcher 9x50 Finderscope, QHYCCD 5L-II MONO Focal reducer:Baader 0.8x Reducer-Field Flattener Software:Astro Photography Tool, DeepSkyStacker x64 by Luc Coiffier, Tony Cook, David C. Partridge Deepsky Stacker 4.1 64bit Filters:ZWO CCD LRGB Filter-Set 36mm, Baader Ha 7nm, zwo EFW 7-position Filter
    2 points
  35. That's very kind of you but I wouldn't bet on it!!! I think mobile or temporary imagers are heroic and I couldn't do it. Getting started can feel hard enough with an observatory, let alone without one. lly
    2 points
  36. Thanks Jeremy next time will be with my new 20mm F2 Tokina I love it there Andy and the kids do too. i must visit 3-5 times a month.
    2 points
  37. I think that what this thread has taught me is that there is no one choice! It should have been obvious to me before, but there are so many considerations and people have different priorities which lead to very different end results. Interesting to see people's choices, mind.
    2 points
  38. Nice report I am also particularly looking forward to gaining a first view of M3 this season, since I have the same set up will as in your report use a 6mm eyepiece. Good that you got to share with your Dad, mine is in his eighties and not in the best of health. He looks forward to my infrequent visits because I usually take along my 8" dob and if suitable a look at the moon is expected. Gets quite captivated by this, considering his situation, these things count.
    2 points
  39. This should be pinned loads of useful information.
    2 points
  40. These are the galaxies I got over two evenings this week. Sadly I didn't get the transparency on the 29th that I had hoped for. After the seminar by @rwg I have reduced my exposures to 2 minutes from 5 minutes, which has given me more colour on brighter stars and doesn't seem to have affected the faint detail. The combination of 150PL, HEQ5 and the 450Dac is promising, but I think a dedicated astro camera, darker skies and still more subs are 'pro indicated'. M101 NGC2903 M65 and M66 M95 and M96 M51
    2 points
  41. Hi Mick I took this one as well this week , was a wow moment 15x120s Luminance binned x2 Taken with ST 102 ZWO 183MM pro and guided I only took 15 shots as this was at the zenith and nearly over my roof !
    2 points
  42. Here is last nights catch of galaxies. Managed to get 5.5 hours, which is close to the limit as the nights are rapidly getting very short up here. It is a slight crop (probably around 25% taken away). It is taken with the ASI071 OSC (33 x 10 min at gain 200, offset 30, -15°C) and Esprit 150 sitting on the Mesu 200. Stacked in PI and processed mainly in PS. Tried for the first time to make flats. I have the optimistic idea that if I keep everything very clean I can get by with only using a master dark for callibration. I still do not think I really need them since I cannot see any dust bun
    2 points
  43. This is what I got so far. Still to design is the IPD adjusting unit before I'll start printing.
    2 points
  44. It's an Astro Tech 102mm F6.9 manufactured about 10 years ago I think. Not too certain about the glass types used, but whatever they used they are very good. Paulastro is its current custodian, and I doubt he'll part with it anytime soon. At Kettering a few weeks ago, parallaxer (Jon), bought the more up to date version. It looked top class but everyone's still waiting for his first light report!
    2 points
  45. Get win 10 on it, dont be tempted by the dark side young padowan... Alan
    2 points
  46. The Sombrero is a real treat - such detail on show. I had seen the Hubble pics before I saw it for the very first time, and didn't dare hope for such 'wow' views - definitely up there with my favourite galaxies! Cheers- you know, it just felt good to use my gear again, and be out there under a big starry sky Yeah the fog cut it short, but the main goal was just getting out there, and I went home with memorable views etched into my mind.
    2 points
  47. It's always nice to get a couple M targets in a single shot, this is from last night - 8 x 7min subs @iso 800 Canon 60Da and Borg 90FL.
    2 points
  48. NGC 3672 is a 11,29 th magnitude Spiral Galaxy appearing in the constellation Crater. It is 76 million light years from our solar system. NGC 3672 appears roughly 2.9 x 1.7 arcminutes in size, corresponding to a physical diameter of 64469 light years. It is a spiral galaxy of morphological type Sc, and is receding at 1865 kilometers per second - about 0.6% of light speed. Skysafari TSOptics RC 8" + Risingcam IMX294+Risingtech software 10x25" gain max+DFC+Startools postprocess
    2 points
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