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Showing content with the highest reputation on 08/11/18 in all areas

  1. 21 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:
  2. 9 points
    This time instead of talking about the title craters, let's talk about the kinds of photos we can get on the Moon. I think the most important thing besides the decision about what to shoot, would be to decide if we are going to shoot a certain target with the Sun down, or with the Sun high. This may seem like just a detail, but does it really change a lot? Photos with the high sun have little contrast, the luminosity is much more uniform and this makes it very easy to get a nice and homogeneous photo. I believe that for those who are starting, it should be the choice on principle and many lunar astrophotographers, almost only take photos in this way. Photos with the sun low, are much more challenging, the lower the lighting angle and the closer to the finish, the more difficult it is to get a good result. This is mainly due to the large contrast difference between light and dark regions, which is why the lunar photographer has to develop a large domain of capture parameters, not to completely burst the light areas, trying to highlight details in the dark areas. A photo with high sun can get incredible results like the last one I posted from Mare Humboldtianum but, a photo with extremely low sun, besides giving a mystery air to the photographed region, reveals details of the terrain (Domes, rhymes, rilles, dorsum , etc.) that could never be perceived in other lighting conditions. I personally am a fan of photos like this post, where you see the ability of the photographer, there that the Moon reveals all its secrets! https://www.astrobin.com/full/375670/0/?nc=user
  3. 7 points
    I had it all figured out, a nice weekend in Germany at the Mosel region. Moon rise late at night, dark skies, great view over the region on top of mont Royal. After the check in I rushed into the back yard. Great open space with the main view at the East. The weather report seemed pretty oke. Soon it became dark and I went outside wth my SW130p flextube. Nice band of stars forming the milkyway. I enjoyed it while the scope cooled down. Double cluster and M31 where naked eye objects. And lower at the horizon I can see M45. I really enjoying this view of the East part of the sky, it's completly blocked by trees at home in my garden. First up NGC 884 /869 the double cluster, great views lot of stars visible and really nice yellow colours forming the center of both clusters. M31 Now this is a much bigger object in the eyepiece under a dark sky. I thought I saw some cloud structure,is this possible at 20X magification? M45 and then fhe lights fade away, clouds came in form the West, set the alarm several times at night but the skies never opend up again that night. Next day I went to Trier a beautiful city with lots of historical sites, while the sky darkend it looked very promising. The whole sky clear of any clouds or haze as you can see at the picture. Almost back at the holiday park we drove into a big cloud, it stayed the rest of the two remaining days, sure bad luck but the Mosel region is a great area for site seeing and make nice long walks. The astro weekend ended with 3 objects, but it was the best M31 ever. greets Gert
  4. 3 points
    Was this bought from www.amazon.com.au by any chance?
  5. 3 points
  6. 3 points
    This is a bit of a zombie thread revival, but I think i might just be justified. I have missed the lovely flat, widefield views through the Genesis since I sold it some time ago, and have always had my eyes open for another decent example. One came up recently and I managed to acquire it with a nice 2" Everbrite diagonal for a reasonable price. Pictures attached. It is very similar to the original one in this thread, quite close in serial number. Had a first look through it tonight and am pleased with what I saw. CA seems better controlled than I recall perhaps a better example or just better aligned? Anyway, nice view of M45 plus the Double Cluster and M31 between the clouds during a quick session tonight. The scope mounted very easily on my Giro-WR mount, ideal for low power sweeping of the Milky Way.
  7. 2 points
    Another dim slow moving comet, 7 X 30secs frames 20 minutes apart before clouds arrived. Taken last night each side of midnight Star Adventurer WOZ61 Canon 60da Dave
  8. 2 points
    I had been reading a number of blogs on general relativity and kept coming across references to a book called Gravitation by Misner, Thorne and Wheeler. As it was relatively cheap (pun intended) on Amazon so I ordered a copy. The delivery man looked flushed after walking up the hill to our house and accepting it almost fractured my wrist. It weighs about 3kg and has more than 1200 pages. Scanning it I reckon at least 2 days or more a page to understand it so I might just get through it before I pop my clogs! Who says education is just for the young! Ok no one. Regards Andrew
  9. 2 points
    Hi all, this is my latest target but not without problems. I have finally had enough of Flat frames! no matter how I take them or mix them I get glowing rings around my targets or just to much noise. This Pacman images is in HOO with darks only applied. At the moment my thoughts on flats is unprintable! Rant over..... Here is my Pacman, 25 x 300s in Ha and only 13 x 300s Oiii. Although far short of the Oiii subs that I would have liked I think its going in the right direction. Any advice on flats would be helpfull. ASI 1600mm pro -20 Thanks for looking in.
  10. 2 points
    Thank you Ruud. Wow, you've had yours from new, that's pretty cool! My serial number is very close to yours I think, 1785 perhaps, will check. I've actually got it outside at the moment and am really impressed. The previous ones I had were very good at low power (That flat field you refer to), but showed plenty of CA and were not great at high power. This one is quite different, much better corrected and I think better collimated. I've just had some cracking views of the Double Double, four lovely little bullseyes. I have sometimes been tempted by the SDF versions but love the speed/short focal length of the original f5, and enjoy the larger exit pupils it gives, along with the wide, flat views. It even gave me some dark markings on Mars just now, and a very clear view of the phase. Not what I expect from a rich field scope! I'm having a bit of a retro evening actually, the Genesis on my equally lovely Vixen GP-DX with Skysensor 2000PC. With a basic 2 star align the gotos are very accurate, am having fun out there! ? Bathing the small person currently but will get back out there later on.
  11. 2 points
    Seeing the latest challenge for imaging constellations reminded me that I hadn't got round to posting this. It's an image of comet 21P/Giacobini-Zinner taken in the early hours of 16th August when it was near the heart and soul nebulae. When I first saw it in the image I thought it was maybe a galaxy or nebula as it's a little fuzzy blob among reasonably sharp stars. It wasn't until a couple of months later when curiousity got the better of me that I looked on Stellarium and found nothing there. Until I put the image date in that is. (curiously only on the tablet version as the desktop version doesn't show comets for me) It's pretty hard to spot in the first image. It was taken as a wide field view of Cassiopeia, with the double cluster and Caroline's Rose Cluster. To find the comet, go straight up from the left side of the double cluster by about a third of the height of the image and you should see a tiny fuzzy blob with a bit of a tail. It may not be immediately obvious I'd taken another set of subs that night that centred on the double cluster. The image wasn't as good overall, so I've cropped it down to just the double cluster and comet. It's a bit more obvious in this one, and is sitting on the extreme left about a third of the way down The next night I was out again taking more images, but pointing at Mirfak and I just caught one half of the double cluster at the top of the image. It may be a bit out of focus, but the image corresponds roughly to the bottom half of the above photo, and it can definitely be seen where there wasn't anything the previous night Had I have known it was this visible I would have looked for it with the scope too! Image 1: Nikon D3100, Nikkor 1.8G 35mm prime, 60 subs at ISO 1600, f2.2 Image 2: As image 1, but 42 subs Image 3: As image 1, but f2.5 Processing in Sequator and GIMP
  12. 1 point
    NGC7023 Imaged over two nights and plagued by satellite trails. Imaged before moon rise on Monday 29th and Tuesday 30th nights. Exposure times were 8x 900s in Red 8x 630s in Green 8x 820s in Blue. Tricky one to process, pushing it so close to the noise levels really brings out faint gradients. Processed in Photoshop. Click for full res but dont look too close ?
  13. 1 point
    Hi Jack, There are a number of my deep sky sketches on the sketching forum, but its been a while since I've posted any. I didn't include any in my replies as I didn't want to hijack your thread in any way. Plus I suspect many will be fed up of my sketches by now. This is your thread and your time to shine, which I believe you will. You've a very nice scope and a good observing eye, so I feel great things will come from you. I'm keen to seeing your future observations.
  14. 1 point
    iPhone X through my Orion XT8
  15. 1 point
    Thanks Mike. I tried swinging over to Capella, which definitely had a halo but not the same intensity as the Pleiades. Tried sketching M37 on Tuesday but the cloud rolled in and tonight feels like a hurricane. A new challenge as I need averted vision to resolve it well in my 4 inch. Are any of your white on black sketches online? Is it much harder to see detail under a red light when using this technique? Thanks again for the encouragement. Jack
  16. 1 point
    I have the Mesu 200 and love it! Balancing is a little strange at first but as others have said, you pretty soon get the hang of it. I have a 6" and 4" refractor permanently mounted on it, each loaded with a camera and I have plenty of capacity to spare. A wonderful mount.
  17. 1 point
    I sold my Baader Hyperions to fund pre-loved ES 82’ EPs due to the poor eye relief of the former. I’m very glad I did. The ES EPs do show some field curvature though when used in my 80 and 120mm frac. The best performer is the 14mm. It suits all my scopes including my 9.25 SCT.
  18. 1 point
    wee time lapse of the camp, first attempt at this so a bit long and forgot to add the sound. could have done with zooming in a bit as well. frames set at 1sec capture, star camp 2018_Small.mp4
  19. 1 point
    Yes, mine was one one the original 5 element smoothsides. Fortunatley the insurance paid out at the time of the theft, so I ended up getting a new set of eyepieces, consisting mainly of the then new Meade Series 4000 5 element plossls. John
  20. 1 point
    Do you have a Microsoft Account? If you get stuck it's worth getting one of the Microsoft helpers to, er, help! One helped me get up and running after a major hardware upgrade early in the year. I needed a valid Microsoft Windows product key which I got from an older Windows 7 version Louise
  21. 1 point
    Beautiful image of the church, but clouds are capricious! I wish we had clouds and rain!
  22. 1 point
    Can't be too bad Stu, the smoothie version of this eyepiece was preferred over the TV 55mm by Bill Paolini in his field test.
  23. 1 point
    Just be aware that if you wanted to eventually use an auto focuser, the new revised Baader SteelDrive focus controller is still under development and they can't commit to a release date yet.
  24. 1 point
    Hi, Welcome to SGL! I think you can get a very good setup with 1.5k. I would definitely make the mount a priority. A good way to do this with your budget is to use the second hand market--perhaps sell some of your current equipment to increase your budget. You will be able to pick up a good quality mount like a HEQ5 or even NEQ6 for less than £500, quite easily. Autoguiding doesn't need particularly expensive kit, £200 pounds max for everything youd need. I use an ASI120 with a 50mm finder and modern astronomy adapter for guiding, it works well at my focal length of 650mm. For a scope you will need something with a sturdy 2" focuser. I use a 130PDS, this scope isn't sold all over the world though so what you get may well be dependent on where you live. Quite honesty I suggest you keep with a newt if you're on a budget. The key things to look out for are ease of collimation, sturdy design without too much weight, and a good size secondary/focuser assembly. You will also need an appropriate coma corrector. Depending on the mount you get, you may be a bit limited in max weight so keep an eye on that. A 10d will do absolutely fine for many targets, although DSLRs have a filter which cuts out infrared light but also the deep red H.a. light given off by most nebulae, so you wont be on top efficiency with it. Hope this helps John
  25. 1 point
    My Star Adventurer mount arrived yesterday (thanks FLO), so instead of just diving in I set up the cameras to do a little un-boxing and first impressions video. I'm really looking forward to getting this little beauty out under the stars to physically test it, but first impressions do fill me with confidence. I hope this is useful for anyone on the fence regarding this mount, I sat on the fence for so long I developed another bum cheek!
  26. 1 point
    That is far to high an input power for the Peltier TEC. I used a 15v 2A one from Farnell Element14 (running on 12v and drawing 19W) and got the temperature down to well below freezing. OTOH, exhaustive testing on a Canon EOS 1100D showed no noise improvement below -5°C and only a little between 0 and -5. With the modern ZWO CMOS cameras the cooling is effective and I have used -10°C effectively with external cooling.
  27. 1 point
    Just FYI, there are free alternatives for Team Viewer, I prefer VNC Viewer/Server.
  28. 1 point
  29. 1 point
    I got the skywatcher dual speed crayford one with a built in extendable draw tube with made the difference required for my camera ?
  30. 1 point
    My first capture of Uranus this year, unfortunately the conditions of seeing was not helping me to get an acceptable catch on this planet. The main difficulty is the low altitude that the planet is for observers of the southern hemisphere, in my case only 49º. Even so, the photo pleased me with the fact that with a little goodwill one realizes that a large region around the north pole is lighter than the rest of the planet. No other spot is visible, I'm sure, as I followed the suggestion of the great friend Christophe Pelier and made an animation with 5 sacks to take the test.
  31. 1 point
    Hi friend Pete! I did it a few more days ago, but I did not get any further details that were not captured in this photo. I have not finished processing yet, but I can see the albedo difference in the north polar region again. The photo below is 2018-11-06 at 02:28 UT.
  32. 1 point
    I'm saying nothing more in this thread!
  33. 1 point
    The main reason I use APT is partly brand loyalty but mainly because it was the software I use(d) with Canon dslrs. It's therefore easy to continue using it with ccd's whether qhy or atik. It's very good and reliable, and the author (Yoddha on here) gives excellent support. APT has good focusing aids, autofocuser control, and platesolve interface (though I still use Astrotortilla). Each to there own Louise
  34. 1 point
  35. 1 point
    That's a good approach, Steve. Just to let you know when you do get round to it, if you are working via WiFi and there's a problem, plugging in the ethernet cable will automatically switch over to wired networking. Which means you don't have to interrupt that session to debug the issue ☺
  36. 1 point
    Check this link , Olli ... an as new ES24/68 at a good price https://www.ebay.co.uk/itm/332870657683?ul_noapp=true The Baader Hyperions have excellent light transmission making them ideal for hunting down faint and tight double stars and also the fainter stars in Open Clusters ... as pointed out above , they do perform better in slower scopes .
  37. 1 point
    These are a couple of images I took last Thursday night through into early Friday morning, went out late, had a few setup niggles but by 11pm everything was doing the right thing. I set up the M45 imaging session in APT as a vertical plan, so it takes a sub through each filter in turn so if the imaging session is interrupted then you at least have data from every filter selected. M45 by 1am was heading over towards the meridian and into my dreaded bubble of logistics center light pollution, so I stopped the session - 2hrs , 30 min each of LRGB in 120s subs. The moon, although only around 40% illuminated was up so I decided to go on with Ha(7nm) only and as Orion was well positioned it was either M42 or Horsehead, I decided Horsehead and set up the plan to run for 2 hrs and use 300s subs. I have had the ASI1600 for nearly a year now, but its sensitivity on unity gain 139/21 is amazing and although these images have quite a bit of noise I am reasonably happy to post them up for everyone to view. The Horsehead focus is slightly soft, my fault for not checking after I slewed over to HH, so its had a bit of de-convolution applied in PI All taken through At106ED with 0.75X reducer/FF and IDAS D2 LPF and Baader LRGBHa(7nm) mounted on AZ EQ6 Captured with APT, processed APP, PI, PS Bryan
  38. 1 point
    Following my recent post on the heart of the heart or melotte 15 I have managed to add some Ha to my widefield RGB heart captured last year. The first 2 photos are the RGB versions captured last year and the next 2 are the HaRGB.
  39. 1 point
    A bright planetary nebula in the constellation Pegasus 20 hours 30 minutes total capture R 19x300s G 20x300s B 20x300s L 21x900s Ha 11x1800s OIII 10x1800s Image captured remotely at Alcalali, Spain 24/10/2018-04/11/2018 APM TMB 152 F8 LZOS, 10 Micron GM2000HPS, QSI6120ws8
  40. 1 point
  41. 1 point
    Olli The ES 82 line are good optically and build wise, almost at premium level but not quite in my view, but close, very close. The 6.7 and 4.7 I had were replaced with Televue (used) Naglers, but due to weight alone. The ES are a bit heavier than Naglers, but at 1/3rd the price that is a fair trade off. I compared the 6.7 mm ES against a 7 mm Nagler and they were so comparable in view I was somewhat taken aback. But the field stops and final build is a step up on the Televue, but that's me wanting top drawer finish. In all honesty the ES was as enjoyable to use and would have been just as much a pleasure to view with. If these fit your price point, you should not be disappointed. Just heed the warning about eye relief. Enjoy whatever you buy.
  42. 1 point
    Sorry fozzy, didn't see this post. I don't actually know what the spec of the Lumicon OIII is, but the waveforms are shown on this site which you may have seen before. http://www.astrosurf.com/buil/filters/curves.htm#Protocol As you can see, some filters described as OIII also include the Ha and SII lines which I assume lowers a contrast a little. The Lumicon has a tight bandpass around the two OIII lines for OIII and including the Hb for the UHC, the cutoff is almost vertical and the transmission percentage for the wanted frequencies is near 100%. I do enjoy the Lumicon, and definitely feel it offers better contrast and visibility than the Skywatcher and the ES ones I've also tried, most likely as a result of the properties above. I'm sure you could work out the bandwidth from the graphs, but I'm not sure how to accurately.
  43. 1 point
    https://www.screwfix.com/p/hardware-solutions-turnbuckle-hook-5-16-zinc-plated/22755 Thats what I use.
  44. 1 point
    13 Percent Waning 4th November Full size, high res image here (big file warning!) 7 Pane Mosaic. ASI174MM on Celestron C11. Mesu 200 mount. Stacked in AS!3, stitched in Image Composite Editor and sharpened in IMPPG. Final processing in Photoshop
  45. 1 point
    Some shots of the Moon on the morning of 31st Oct. 1Deg C in the obsy... The whole image a stack of 5 subs from my Canon 650D ISO200 1/250th sec. Processed in Registax and Photoshop The detail shots done using an Altair Astro 178C either 1000 or 2000 frames with a 2.5x Barlow. All on my 9.25SCT. took the best 25 - 40% using Autostakkert and then tweaked them in Regsitax wavelets and finished off in Photshop. Seeing was on a 4-5 using the Damian Peach scale hence I got away with the Barlow.
  46. 1 point
    heres a few shots from sunday, I got bushwack by the cloud before I could get the rest and wide shots. kit starwave 102, asi 120mc. thanks for looking. clear skys. charl.
  47. 1 point
  48. 1 point
    Oops! That should read 0 deg DEC for calibration not 30 deg... Actually, it should be within 10 degrees of 0 deg DEC
  49. 1 point
    Hmm, seems a bit odd Neil, unless you have a very strong R4 signal perhaps. What mode are you in, USB, LSB, CW, FM? Do you mean a fainter R4, or another signal? You shouldn't pick up anything there. As a start, I'd suggest what I always recommend, tuning to the 2m beacon GB3VHF on 144.430 Mhz (http://www.gb3vhf.co.uk). See if you can detect that, at least it's near the Graves frequency. Ian
  50. 1 point
    M34 in Perseus 6 x 120 sec lights 24 darks 30 flats 30 bias 20 March 2018
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