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    • By StarPrincess
      Moon Surface 16 April 2021 21:32 Celestron NexStar 6SE ZWO ASI 462mc
    • By MarsG76
      This is NGC3603 and NGC3576 (AKA The "Statue of Liberty" nebula), a massive H-Alpha region containing a very compact open cluster, located in the constellation "Carina" about 20,000LY away.
      I took this photo on multiple nights, between 19th February and 15th March 2021.
      Imaged using my cooled and full spectrum modded Canon 40D DSLR attached to a Bosma 80mm f6.25 refractor on a CGEM equatorial mount.
      Total exposure time was 22 Hours and 1 minute using 7nm HII, OIII and SII Narrowband filters and stars are from natural color (UV/IR Cut filter) subs... imaged from a semi rural sky.
      HII: 6x600s, 6x900s and 4x1200s subs,
      OIII: 10x900s, 8x1200s and 1x1800s subs
      SII: 18x1800s subs
      RGB: 19x60s, 19x120s, 18x180s and 20x300s subs @ ISO1600.
       
    • By stevewanstall
      A very crisp and cold night.  I added more luminance data and also collected some RGB for NGC 2841. There is now around 4 hours in L and an hour each in R, G and B. The subs are 114s at a gain of 139. 
       
       

       
      Wikipedia:
      NGC 2841 is an unbarred spiral galaxy in the northern circumpolar constellation of Ursa Major. A 2001 Hubble Space Telescope survey of the galaxy's Cepheid variables determined its distance to be approximately 14.1 megaparsecs or 46 million light-years. 
      This is the prototype for the flocculent spiral galaxy, a type of spiral galaxy whose arms are patchy and discontinuous. The morphological class is SAa, indicating a spiral galaxy with no central bar and very tightly-wound arms. There is no grand design structure visible in the optical band, although some inner spiral arms can be seen in the near infrared. 
      The properties of NGC 2841 are similar to those of the Andromeda Galaxy. It is home to a large population of young blue stars, and a few H II regions. The luminosity of the galaxy is 2×1010 M☉ and it has a combined mass of 7×1010 M☉. Its disk of stars can be traced out to a radius of around 228 kly (70 kpc). This disk begins to warp at a radius of around 98 kly (30 kpc), suggesting the perturbing effect of in-falling matter from the surrounding medium.
      The rotational behaviour of the galaxy suggests there is a massive nuclear bulge, with a low-ionization nuclear emission-line region  at the core; a type of region that is characterized by spectral line emission from weakly ionized atoms. A prominent molecular ring is orbiting at a radius of 7–20 kly (2–6 kpc), which is providing a star-forming region of gas and dust. The nucleus appears decoupled and there is a counter-rotating element of stars and gas in the outer parts of the nucleus, suggesting a recent interaction with a smaller galaxy.
      Equipment: Celestron 9.25 XLT at F10, Skywatcher EQ6 Pro GEM, ZWO 1600MM Pro, ZWO EFW with ZWO LRGB filters, QHY5IIC guide camera on Skywatcher 9 x 50 finderscope
    • By MarsG76
      Hello All,
      This is a photo accurate representation of how I've seen the conjunction through a Skywatch 14" f4.6 Dobsonian, using the 17mm Ethos eyepiece combined with the 2X Powermate during the observation of the great conjunction of Jupiter and Saturn, and how well both of the planets fit into the eyepiece field of view.
      My location on the east coast of Australia was totally overcast for the last week and this evening I had a small window of opportunity to actually have a glimpse of the rare event, which no doubt, I will not have a another chance of experiencing in my life time.
      This happened about 17 hours after the actual closest point between the planets, and most likely the difference would be so small that it wouldn't be noticeable without direct comparison. 
      This image was composited by first taking a series of shots through the eyepiece using an iPhone, I chose the best frame of the series than superimposed the overexposed planets with images of the planets captured separately with enough transparency as to accurately show how the planet details looked in the eyepiece.
      Observation time was 22 December 2020 @ 09:51 UTC.
      Clear Skies,
      MG
       
       

    • By Macropanda
      Hi... Hope this is ok to post here.

      I've built an app to create star trail images and videos using an iPad or an iPhone and i'm really struggling to find beta testers.
      Check out the photo and video I've added to the post to see what it can do and and click the link if you want to try it out.
      https://sites.google.com/view/starstackerforios-beta/home for info.
      https://testflight.apple.com/join/7iLGfVDG to get the beta.
      It's free to have early access to the beta. I'm just hoping to get a bit of feedback before it releases.
      Many thanks!


      Star Stacker iOS.mp4
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