Popular Post Astrobdlbug Posted January 31 Popular Post Share Posted January 31 (edited) I managed 60 2 minute subs early this evening between 6:30 and 8:30pm. Deleted about 20 subs due to clouds - this is 86 minute integration. I am also pleased that I captured a few galaxies in the FOV, have not plate solved yet Updated with annotation for galaxies , NGC2655,NGC2715,NGC2732,NGC2653 all make a guest appearance alongside the comet. Processed twice through APP, once for stars and once for comet, moved to PI to use GHS stretch and then into PS CC to build the final image I used StellaMira 90mm with 0.8 FF/FR and ASI2600MC. May try again tomorrow evening as forecast seems to indicate a few hours of clear skies, Bryan Edited January 31 by Astrobdlbug 10 Quote Link to comment Share on other sites More sharing options...
TerryMcK Posted January 31 Share Posted January 31 Great work Bryan. Nice colouring and the tail is very apparent. 1 Quote Link to comment Share on other sites More sharing options...
mightymonoped Posted January 31 Share Posted January 31 Nice work Bryan! This (apart from the PI bit) is exactly what I have tried to do several times now over the past week or so. Unfortunately, I’m in the Astro Doldrums…the pillar and roof structure of the balcony intrudes on any framing I can get of the comet, to the extent that it renders any unstacked/stacked image unusable. Made even more frustrating by the fact that the tail is clearly visible. I really don’t want to move the mount at all as it’s working nicely from the moment it is powered on. Hey ho! I’ll have to just bear with it on this one and enjoy great shots like this. At least theres some consolation in knowing I would have captured it. 🤣 1 Quote Link to comment Share on other sites More sharing options...
Sonyme Posted January 31 Share Posted January 31 Stunning Bryan. I was up in North Yorkshire on Friday and Saturday and managed to capture a couple of shots of the comet. Used my Cannon, basic tripod, shutter release cable and Samyang 135 F2 lens. Got it first go. Green / blue and a hint of tail but not worthy of posting here. Gary 1 Quote Link to comment Share on other sites More sharing options...
TerryMcK Posted January 31 Share Posted January 31 Too cloudy in these here parts for me to even get the binocs out! Looks like that for the next few days 😞 1 Quote Link to comment Share on other sites More sharing options...
Bob-c Posted January 31 Share Posted January 31 A great image Bryan. Bob. 1 Quote Link to comment Share on other sites More sharing options...
Adam Y Posted January 31 Share Posted January 31 I managed one a week or so ago but it wasn't quite bright enough to show the tail. Nice and green though! Next clear night is Friday for me so I might try again then. You've set a high bar with this stunning image, Bryan! 1 Quote Link to comment Share on other sites More sharing options...
woodblock Posted February 1 Share Posted February 1 Great picture Bryan. Can I ask about guiding? You say 2 minute exposure. Were you guiding and was there any evidence of the comet drifting in the field during that time since I think it must move against the background stars? Steve 1 Quote Link to comment Share on other sites More sharing options...
Astrobdlbug Posted February 1 Author Share Posted February 1 (edited) 47 minutes ago, woodblock said: Were you guiding and was there any evidence of the comet drifting in the field during that time since I think it must move against the background stars? Yes - guided on stars so the comet drifts in the FOV. So you have to frame the comet in such a way that over 1-2hr session it will stay in FOV- so a bit of planning with SkySafari or stellerium. So in processing the subs this is where the comet registration mode in most stacking programs comes into play. So if you want an image like this one with comet on static star background, you process the subs twice 1- register on stars to create a static star background and then extract the star layer with StarXT or Starnet++ 2- register on comet (in this mode the program needs you to identify the comet nucleus in a few frames so it can calculate the dy/dx- drift and create the registered comet data to integrate. Also by using MAD rejection the program will also minimise and remove star trail- there is a decent video tutorial posted on astropixel processor forum on this processing method- also at moment YouTube has loads of videos how to use pixinsight and other tools to process a ‘Green Comet’ image. hope this helps Bryan Edited February 1 by Astrobdlbug 1 Quote Link to comment Share on other sites More sharing options...
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