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Showing content with the highest reputation since 06/10/13 in all areas

  1. 79 points
    Happy New Year Everyone. So finally after 9 months processing, which included a full redo of the RGB blend, I have finished the 2nd Mega Mosaic to complement the 400hr Orion Mosaic myself and Olly made. This mosaic began in 2012 where I collected 30 panes of Luminance. In 2013 I completed 2 rows of RGB. Later in 2015 while taking imaging trips at Ollys in Les Granges, I finished the RGB panels, and I took Ha data to blend into the central rift area. I also took an extra LRGB column on the left hand side of the image. Like the Orion mosaic, this had data at 0.53m with added 1m resolution data for the Eagle, Swan, Lagoon and Trifid nebulae. Again this is the highest resolution image of this area of the sky as far as I am aware of. Thanks Tom. Flickr image can be seen here. https://www.flickr.com/photos/28192200@N02/24086292076/in/dateposted-public/
  2. 54 points
    Two panels, the lower one from last year. The top one was from this week, with guests, but Tom remembered that he also had a good dose of Shark Nebula data so that went in as well. The lower panel is Ha OIII LRGB for the supernova remnant and planetary nebula while the top is only LRGB. About 50 hours, dual Tak FSQ106N/Atik 11000/SXVH36/Mesu 2000. This time I went for an honest colour, resisting the temptation to try to make the Shark look like an emission nebula! The three VDB objects are, 149, 150 and 152. The PN is G111.0+11.6 (catchy name) and the SNR is ... I've forgotten!!! Olly, Tom and guests.
  3. 48 points
    First time I have a proper go at some astro with my nifty fifty lens. Canon 600d full spectrum, ISO800, 50mm f1.8 lens stopped at f4, 10x600sec guided on my eq3 pro mount. I love how it came out.
  4. 39 points
    NGC 6888, the Crescent nebula, very near to Sadr in Cygnus is thought to have started formation about 250,000 years ago. The central star is very massive, and has a solar wind so strong it has blown off roughly the same mass as the sun every 10,000 years. This wind has collided with gas that had been shed by the star in a series of shells in the past, and the wind has heated it and caused to glow. At a distance of about 4700 light years, the light that those of us who’ve imaged or viewed this have just received left at a time that saw the start of the bronze age, the beginning of writing and the spread of agriculture. World population was between 7 and 14 million. Not long ago in the big scheme of things In this image I’ve set out to get as much depth in the OIII as I could, rather than concentrating on the Ha as the dominant filter. The OIII in this target is often treated as a kind of second cousin, but it’s really interesting, and very different in structure from the Ha. Imaged in June and July 2014 from Weymouth, Dorset. Telescope. 12 inch Ritchey Chretien @ F5.3 Camera. Atik 460 EXM, Baader filters Ha. 16 x 30 minutes OIII. 16 X 45 minutes RGB. 11 x 5 minutes for each filter All subs binned 2x2 Ha-red, OIII-green and blue RGB stars added as individual 'lighten' layers to each mono sub master Captured, calibrated and stacked in Maxim and processed in PS CS6.
  5. 32 points
    Almost a month with no clear skies here in the south, but when I open up a little there I am capturing whatever is possible. Even having to get up at 6:00 a.m. did not resist and stayed until midnight to do this capture of Saturn. A photo with almost everything you have right, very visible tracks, Cassini and Encke Division, weak but present Ring C and even the famous polar hexagon. The snag was due to the excessive turbulence that caused the planet to jump too much and caused that edge ring where the north pole is lying in the Cassini Division, but nothing that greatly dismantles this beautiful astrophoto. I suggest to your colleagues to see the image in original size at this link: http://www.astrobin.com/full/298696/0/?nc=astroavani&real=&mod=
  6. 32 points
    I hope to catch more Lum tomorrow evening with clear skies forecast at the moment - here is a relatively quick process of the Leo Triplet M66/M65 NGC3628 group with 6 hours integration from last night. This is only the second time I have used 600s Lum subs and my skies can just about withstand that duration if I have good transparency and no moon. The tidal tail of NGC3628 is just beginning to reveal itself; it sure is faint. I was inspired to see if I could capture this feature after seeing ShineOn's image and also Olly's magnificant image (amongst other great captures too). Details: William Optics FLT132 at F5.6 QSI683-wsg and Astrodon LRGB filters 18 x 600s Lum 12 x 300s RGB each Avalon Linear Fast Reverse SGP and PI Thanks for looking and fingers crossed for more clear skies .
  7. 31 points
    I would like to post a big thank you to a trustworthy & fellow astronomer. I recently placed an advert on both SGL and ABS UK to to trade My 17mm Ethos for one of three eyepieces that were of interest to me, and eventually I received response.......... Now if I am honest I did feel a little nervy abut sending my treasured Ethos to someone I didn't know and it did cross my mind if I would ever hear from them again after sending it to them. However, after a few exchanges of e-mails we both agreed on a swap and off I went to the post office. Today I received the eyepiece and I believe this is a wonderful example of something positive happening in a time when doing good seems not so common..... here we have two people sending two very expensive eyepieces across the channel based purely on integrity & trust in one another. In reality either one of us could have pretended that we had sent an eyepiece and thus just keeping the one we received I didn't know Sylvain was a member of SGL until he replied to a post I made about having a Leica zoom in the post..... this just goes to show that SGL is bursting at the seems with great people. I guess this is not really any different to paying someone selling an item and not receiving the goods, and I am sure is an every day event. Anyhow I thought I would post it because it made me feel good about the world. Thank you Sylvain
  8. 30 points
    Thanks to Knight of Clear Skies for the suggestion that this might be interesting. It was. Firstly I took a lot of persuading that the open cluster-like powder of tiny stars in the centre really was a dwarf galaxy at 81 kiloparsecs.I think it is, though. It was nice, also, to catch a fair amount of patchy IFN including that distinctive streak. I haven't seen this in images I've found but doubtless someone will have caught it before. I really needed good flats for this and finally obtained some for Yves' SXVH36 by shooting them in AstroArt rather than Nebulosity. Flats shot in Nebulosity always over corrected but, at long last, that problem is solved. So this took two nights in the tandem Tak. SQM 21.75 and superb seeing. Atik 11000, 14x10 minutes per colour. SXVH36 19x30 minutes luminance. Total 16.5 hours. Processing in AstroArt, Registar, Pixinsight and Photoshop CS3. For the fullsize (good for fuzzies) click on the image and there should be a button in the bottom left. Olly
  9. 29 points
    Tom took charge of getting me a large print done by his regular photoprinter in Ireland and it shipped over, but then got delayed for long enough for us to have gone on holiday by the time it arrived. However, our friend Ray noticed it on the van driver's list while receiving something himself and told the driver he'd take it. He then lent us his minibus so that while Tom was here on holiday we could collect it from the framers. The good people at the Crayon Gris art shop in Sisteron handled the framing. They, too, are friends because Monique exhibits with them. (The multiple virtues of small communities!) It's framed in aluminium extrusion and behind museum quality plexiglass. The framers pointed out the danger of glass at this size, it's extreme weight and prodigious expense. In fact it's very transparent on far less reflective than it appears in the photo. We run a guest house so we don't want anything dangerous, either. So this is only a tiny fraction of what would be possible in terms of size from our 33 panel mosaic but we didn't have a wall that could take anything bigger! All good fun. Olly - and thanks to Tom and Ray along with Francis and Cécile of the Crayon Gris.
  10. 29 points
    Finally, after much trial and tribulation, I have my camera/scope combination right and working correctly....no camera issues (my old H18), or problems with astigmatism with the scope. This is a target I’ve imaged before, but I like this galaxy and it’s well positioned at the moment, so chose it as my ‘first light proper’ for the rig. A quick bit of background info..... NGC 891 in Andromeda is one of the most photogenic edge-on spirals around and about 30 million light years away. We are looking at light that left near the start of the Oligocene epoch, the time of the transition between the tropical Eocene and the more modern ecosystems of the following Miocene. This is the time when grasslands, and the associated grazing animals were spreading, and the tropical forests were becoming limited to the equatorial belts. The planet was getting cooler and more seasonal, and in Europe, the Alps were rising as the African landmass continued to push northwards. There was also a major extinction event, where Asian fauna replaced the previous European fauna. Some species of terrestrial mammals returned to the oceans about this time. Amongst these were the ancestors of the dolphins. The imaging data is...... Telescope. 12 inch custom Ritchey Chretien with GSO optics (started life as a standard GSO, but very little of the original scope remains) Camera. Atik 460 EX mono. Filters. Baader LRGB & Hutech IDAS filter. 40 x 8 minutes Luminance 22 x 220s Red, 20 x 200s Green, and 22 x 240s Blue. All subs binned 2x2, and an AP 0.67X focal reducer used, giving a focal ratio of F5.4 Total imaging time. 9 hrs 15 minutes. As I binned the data 2x2 (giving a resolution of 1.14 arc secs per pixel), for the processing, in order to avoid artifacts, I substantially increased the image size, and then reduced it again for the final image. Imaged on the 29th & 30th November 2013 from Weymouth, Dorset.
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