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Found 9 results

  1. WiKi IC 5146 (also Caldwell 19, Sh 2-125, and the Cocoon Nebula) is a reflection/emission nebula and Caldwell object in the constellation Cygnus. The NGC description refers to IC 5146 as a cluster of 9.5 mag stars involved in a bright and dark nebula. The cluster is also known as Collinder 470. It shines at magnitude +10.0/+9.3/+7.2. Its celestial coordinates are RA 21h 53.5m, dec +47° 16′. It is located near the naked-eye star Pi Cygni, the open cluster NGC 7209 in Lacerta, and the bright open cluster M39. The cluster is about 4,000 ly away, and the central star that lights it formed about 100,000 years ago, the nebula is about 12 arcmins across, which is equivalent to a span of 15 light years. When viewing IC 5146, dark nebula Barnard 168 (B168) is an inseparable part of the experience, forming a dark lane that surrounds the cluster and projects westward forming the appearance of a trail behind the Cocoon. Taken the night of 7/8 August 19. 75 x 120s Lights 50 darks/bias Master Flat Processed in Pixinsight. Atik 4120EX OSC C11 Hyperstar Mesu 200 mount. OAG Guiding using TS65EQ ZWO OAG and Lodestar X2.
  2. Since parts of the Cocoon nebula are fairly faint, I decided on a LRGB + Ha strategy and a reasonably long total exposure (13 hours). In an attempt to maximize details, I also decided to blend the Ha into both the Luminescence and Red channels. I quite like the result. All constructive comments are welcome. Alan IC 5146 wide field (also showing the dark nebula Barnard 168) IC 5146 closer crop (showing the structure of the emission/reflection nebula) LIGHTS: Ha: 5 x 1800s; L:19; R:16: G: 13; B: 15 x 600s. DARKS: 30; FLATS:40 all at -20C.
  3. Cocoon Nebula: Not an easy target from London as it is quite faint but worth trying to capture because it's such a pretty object. With an f12 scope it took three and a half hours of exposure to get this much detail. A lot of stopping and starting due to guiding problems meant I had to crop it more than I wanted to resulting in the stars looking a bit bloated, and more sessions would only make that worse, so this first attempt is completed. However this is definitely a target to return to. 26 x 8 minute exposures at 400 ISO (3 hours and 28 minutes) 27 x dark frames 20 x flat frames 21 x bias/offset frames (subtracted from flat frames only) Captured with digiCamControl Guided with PHD2 Processed in Nebulosity, Maxim DL and Photoshop Equipment: Celestron NexStar 127 SLT Skywatcher EQ5 Mount Orion 50mm Mini Guide Scope ZWO ASI120 MC imaging and guiding camera Canon 700D DSLR
  4. This is an image created from data I took almost a month ago. I didn't really intend to do anything with the data, as I was just testing the mount and different exposure lengths contra ISO settings. But a very long period of clouds, (I've literally not been out with the scope for a month) made me go back through some old files to see if there was anything I could fiddle with to fill the time. I found these and merged them together. 3 subs with a total integration time of 16 minutes (what an astounding amount of data!). One sub of 120 secs with ISO 6400. One sub of 360 secs ISO 1600 and one with 480 secs ISO 1600. No darks, bias or flats either. Just pure, raw, noisy data! But I am honestly pleased with what I could make of it, as I first off didn't even expect to get anything out of doing those images, and not knowing how easy pulling our details on this object was either. The Cocoon Nebula (IC 5146) 3 Subs (2 Min, 6 Min, 8 Min) Iso 6400 and 1600 16 Minute Integration Time Skywatcher 150pds Celestron Advanced VX Mount Nikon d5200 Explore Scientific Coma Corrector Baader Neodymium Filter Stacked and Processed in Photoshop CS2
  5. alan4908

    Cocoon Nebula

    From the album: Deep Sky II

    My first attempt at the Cocoon Nebula. Since I'd read it was quite faint I decided on quite a long exposure (13 hours) and blending the Ha into the both the red and luminescence channels. I quite like the result. LIGHTS: Ha 5 x 1800s, L: 19: R:16;G:13;B:15 x 600s
  6. From the album: The-MathMog's Images

    The Cocoon Nebula (IC 5146) 3 Subs (2 Min, 6 Min, 8 Min) Iso 6400 and 1600 16 Minute Integration Time Skywatcher 150pds Celestron Advanced VX Mount Nikon d5200 Explore Scientific Coma Corrector Baader Neodymium Filter
  7. After a frustrating few days the sky was remarkably clear over South Oxfordshire on the night of the 5th of October. While the telescope was busy taking images of the Cocoon nebula, I was scouting around the same region with my binoculars. I usually survey the area before I image, using the bins, as start hopping is then much easier and it's often useful to see things the right way up. The sky was very transparent and I could see the East and West sections of the Veil nebula (the first time I'd just about made out the Western section with the binoculars). When I scanned past M39 on to pi-2-Cyg and then traced a right angle to the left down to C19, I noticed that there was a very straight dark band against the Milky Way. To say I was surprised to see this was an understatement and at first I thought that it might be a contrail from a passing jet. It was still visible a few minutes later so it was a real feature, dust band, in the Milky Way. I notice on really good images (not my one) of C19 the nebula is sitting at the end of a dark dust band - rather like a rock in a stream with wake trailing behind it. I expect that this is what I must have seen, though the nebula itself wasn't apparent (though I half convinced myself, fleetingly, that I could see a faint fuzzy glow). Has anyone else seen this? I didn't explore the length of the dark trail, I just crossed over it a few times to try to find out where it was placed, and I wish now that I'd spent more time with it. Dark bands against the Milky Way is a whole new level of stargazing - or perhaps the opposite of it, if you see what I mean.
  8. This one I took yesterday evening, after doing a "round" of collimation of primary on my RC8" to check if things have improved. Indeed, stars look much nicer than my previous shot of M27, but there is still room for improvement (left hand side is still out of focus, probably a bit more at the top), but I'm really pleased with my first attempt on collimation of primary for RC (did not use any fancy equipment, just cam, bahtinov mask, Sharpcap and eyeball mark I). I messed up flats, well actually it seems that dust particle settled on the filter between shooting and taking flats (which is really amazing since it took me about 2 minutes, to put flat panel on and start taking flats after I finished with lights, but it was probably due to manually rotating OTA to point up from parked position). This is 120x60s with ASI1600, IDAS LPS P1, excellent seeing (my guess is 1" or less, guiding was good 0.5-0.6" RMS with occasional drop to 0.4" RMS), transparency was really poor, and temperature high (ASI1600 struggled to keep temp -20C, for most of the subs it was -19.7C with cooler on 100%) Just basic calibration, stretch and a bit of noise reduction. Not a showpiece work, but I thought of posting it never the less, it might be of use as a reference to someone. Thanks for looking!
  9. Hello, This Saturday managed to gather some photons before the Moon rise. Here is my rendition of the Cocoon nebula. Equipment - MN190 + 550D + EM200, APT + PHD Details - 13 x 7min + 1 x 6min = 1h 37min, no darks - only dithering Hope you like it
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