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

  1. 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
  2. 3 points
  3. 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
  4. 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
  5. 1 point
    Beautiful image of the church, but clouds are capricious! I wish we had clouds and rain!
  6. 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.
  7. 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
  8. 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
  9. 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.
  10. 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.
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