Popular Post Hannahgrace Posted January 2 Popular Post Share Posted January 2 (edited) (Text from my Instagram) Abell 85 / CBT-1 / LBN576. A very, very faint supernova remnant in Cassiopeia. It’s around 10,000 years old, and almost 10,000 light years away. The oiii is almost non-existent in a 10 min exposure. A labour of love with over 70 hours of HOO data (Ha25/Oiii45) 22 nights(&mornings!)425 x 600s subs. Very impressed with the detail my trusty @sky_watcher_official evostar 80mm refractor has picked up. Absolute brilliant value for money. I only lost 1 x Ha frame and 4 x Oiii frames when I was pre-processing this, so I’m super happy! (Lovely, wonderful EQ6r-pro 🙏🏼) Better res on Astrobin; https://www.astrobin.com/e94bni/ Edited January 2 by Hannahgrace Image was not uploading 10 Quote Link to comment Share on other sites More sharing options...
Carastro Posted January 3 Share Posted January 3 (edited) A great result Hannah. I have never tried this target living where l do. 70 hours!?!? Never heard anyone do that much on one target before. But what a fantastic result. Carole Edited January 3 by Carastro 1 Quote Link to comment Share on other sites More sharing options...
TerryMcK Posted January 3 Share Posted January 3 Nice result. What flattener did you end up using on the scope? 1 Quote Link to comment Share on other sites More sharing options...
Sonyme Posted January 3 Share Posted January 3 Very Nice Hannah. Your image has an almost embryonic look about it. I notice there are some wisps of white, shell like nebulous material quite some distance from the centre of your image. Perhaps remnants of the early stages of the nova. Happy New Year by the way! Gary 1 Quote Link to comment Share on other sites More sharing options...
Dmack1 Posted January 3 Share Posted January 3 That is just stunning. Wonderful detail and excellent processing. Well done indeed. 1 Quote Link to comment Share on other sites More sharing options...
P Holdsworth Posted January 3 Share Posted January 3 Wonderful image Hannah. Detail is amazing 👍 Paul 1 Quote Link to comment Share on other sites More sharing options...
Astrobdlbug Posted January 3 Share Posted January 3 Just WOW !! What dedication to a single target - funnily enough I started looking at LBN576 as well at beginning of December and also experimented with 10min subs, but when I reviewed the 7 subs I captured and did a trial integration I realised this target needed a massive amount of time to do it justice , as your 70hrs have proven so well - so I gave up and concentrated on the Christmas Tree Cluster as a mosaic..... Your 70hrs and dedication have delivered an exceptionally deep image with a huge amount of detail, your processing is wonderful, my only feedback would be it does look almost 'starless', personally I also like to de-emphasise stars when there is so much detail in nebulosity, however for your image I would lift the stars fractionally so they contribute rather than fade into the background, but thats a really minor thing for such an amazing image, well done - and TBH, I really cant get over 70 hours ... Bryan 1 Quote Link to comment Share on other sites More sharing options...
MartinS Posted January 3 Share Posted January 3 Wonderful image Hanna. I assume you don’t live in the U.K. I don’t think I’ve ever achieved more than 50 hours imaging in a month, let alone 70 on a single target. Well done. 1 Quote Link to comment Share on other sites More sharing options...
Hannahgrace Posted January 3 Author Share Posted January 3 10 hours ago, Carastro said: A great result Hannah. I have never tried this target living where l do. 70 hours!?!? Never heard anyone do that much on one target before. But what a fantastic result. Carole Thank you Carole! its very faint but a very good location high in Cassiopeia. Aha it is very very faint and really needed lots of oiii time! 🙂 thank you! Hannah Quote Link to comment Share on other sites More sharing options...
Hannahgrace Posted January 3 Author Share Posted January 3 9 minutes ago, MartinS said: Wonderful image Hanna. I assume you don’t live in the U.K. I don’t think I’ve ever achieved more than 50 hours imaging in a month, let alone 70 on a single target. Well done. Thank you very much. I do live in Southwest UK. This took 2 months. 🙂 thanks! Hannah 1 Quote Link to comment Share on other sites More sharing options...
Hannahgrace Posted January 3 Author Share Posted January 3 1 hour ago, Astrobdlbug said: Just WOW !! What dedication to a single target - funnily enough I started looking at LBN576 as well at beginning of December and also experimented with 10min subs, but when I reviewed the 7 subs I captured and did a trial integration I realised this target needed a massive amount of time to do it justice , as your 70hrs have proven so well - so I gave up and concentrated on the Christmas Tree Cluster as a mosaic..... Your 70hrs and dedication have delivered an exceptionally deep image with a huge amount of detail, your processing is wonderful, my only feedback would be it does look almost 'starless', personally I also like to de-emphasise stars when there is so much detail in nebulosity, however for your image I would lift the stars fractionally so they contribute rather than fade into the background, but thats a really minor thing for such an amazing image, well done - and TBH, I really cant get over 70 hours ... Bryan Thank you very much! I started this at the beginning of November and finished collecting data on the 29th December so it took quite a while but I’m more than happy to image a single target for a while!! I can appreciate your comment about the stars, I did start off with them a bit brighter, but they just overtook the detail in the supernova remnant for me. I like them how I’ve left them. There are so so so many stars in this area 😂 before I removed them to work on them the nebula was almost invisible haha!!! It’s my longest image to date, everything else (bar a few) are around 30. thanks again Bryan🙂 Hannah Quote Link to comment Share on other sites More sharing options...
Hannahgrace Posted January 3 Author Share Posted January 3 2 hours ago, P Holdsworth said: Wonderful image Hannah. Detail is amazing 👍 Paul Thank you very much Paul! Hannah. Quote Link to comment Share on other sites More sharing options...
Hannahgrace Posted January 3 Author Share Posted January 3 6 hours ago, Dmack1 said: That is just stunning. Wonderful detail and excellent processing. Well done indeed. Thank you so much! 🙂 so kind! Quote Link to comment Share on other sites More sharing options...
Hannahgrace Posted January 3 Author Share Posted January 3 8 hours ago, Sonyme said: Very Nice Hannah. Your image has an almost embryonic look about it. I notice there are some wisps of white, shell like nebulous material quite some distance from the centre of your image. Perhaps remnants of the early stages of the nova. Happy New Year by the way! Gary Thanks very much Gary! I know what you mean. Yes there’s lots of that, I was shocked when I stacked it all and saw that!! Happy New Year! Hannah Quote Link to comment Share on other sites More sharing options...
Hannahgrace Posted January 3 Author Share Posted January 3 9 hours ago, TerryMcK said: Nice result. What flattener did you end up using on the scope? Thank you Terry. its the dedicated skywatcher 0.85x one 🙂 Hannah 1 Quote Link to comment Share on other sites More sharing options...
MartinS Posted January 3 Share Posted January 3 40 minutes ago, Hannahgrace said: Thank you very much. I do live in Southwest UK. This took 2 months I am envious of your skies in the Southwest. Your dedication to this one target is outstanding and exemplary. 1 Quote Link to comment Share on other sites More sharing options...
Hannahgrace Posted January 3 Author Share Posted January 3 1 hour ago, MartinS said: I am envious of your skies in the Southwest. Your dedication to this one target is outstanding and exemplary. It took 22 nights/mornings 🙂 I booked a day or two off of work when it was clear all night so I could do a few all nighters haha! Thank you so much 🙂 Quote Link to comment Share on other sites More sharing options...
Greg M Posted January 10 Share Posted January 10 Very nice! Before you know it, you'll be taking 15, 20, and 30 minute subs! 1 Quote Link to comment Share on other sites More sharing options...
Hannahgrace Posted January 11 Author Share Posted January 11 17 hours ago, Greg M said: Very nice! Before you know it, you'll be taking 15, 20, and 30 minute subs! Thanks!! I did try a 15 min the other day and the Eq6r handled it perfectly! 🙂 I quite like 10 mins and I had to discard hardly any compared to all my projects with 5 min subs! So happy 🙂 1 Quote Link to comment Share on other sites More sharing options...
Adam Y Posted January 12 Share Posted January 12 (edited) Slightly on topic, I am curious to know - what is the thought process when deciding whether to take (say) 20 x 10-minute subs or 10 x 20-minute subs? Stunning image, Hannah!! Edited January 12 by Adam Y 1 Quote Link to comment Share on other sites More sharing options...
Hannahgrace Posted January 14 Author Share Posted January 14 On 1/12/2023 at 1:20 PM, Adam Y said: Slightly on topic, I am curious to know - what is the thought process when deciding whether to take (say) 20 x 10-minute subs or 10 x 20-minute subs? Stunning image, Hannah!! Thank you! 10 min subs are half of 20 (of course) so if guiding did mess up I wouldn’t waste as much time! For me it is the perfect balance between getting a nice amount of signal, and the least risk of guiding catastrophes and wasted subs! 1 Quote Link to comment Share on other sites More sharing options...
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