Sterrenland Posted August 11, 2021 Share Posted August 11, 2021 Managed about 100 mins on the Elephant's Trunk Nebula last night...must say using the new 294MC camera together with guiding/dithering via the ASIAIR PRO is being a bit of a revelation. I'm still adjusting the guiding settings, but got much better figures during this session so am slowly getting things sorted. First time on this nebula...another beauty that deserves further work. 5 Quote Link to comment Share on other sites More sharing options...
peter shah Posted August 11, 2021 Share Posted August 11, 2021 a wonderful result 1 Quote Link to comment Share on other sites More sharing options...
AstronomyUkraine Posted August 11, 2021 Share Posted August 11, 2021 1 hour ago, Sterrenland said: Managed about 100 mins on the Elephant's Trunk Nebula last night...must say using the new 294MC camera together with guiding/dithering via the ASIAIR PRO is being a bit of a revelation. I'm still adjusting the guiding settings, but got much better figures during this session so am slowly getting things sorted. First time on this nebula...another beauty that deserves further work. Very nice image with plenty of detail. The guiding assistant is your friend in PHD2, choose the settings it recommends. Run it for a full cycle of the worm, usually 8 or 9 minutes before stopping it, then let it calculate the settings. 1 Quote Link to comment Share on other sites More sharing options...
paul Posted August 11, 2021 Share Posted August 11, 2021 I like your subtle colouring and you've picked up is lots of interesting features. 1 Quote Link to comment Share on other sites More sharing options...
ApophisAstros Posted August 12, 2021 Share Posted August 12, 2021 12 hours ago, Sterrenland said: Managed about 100 mins on the Elephant's Trunk Nebula last night...must say using the new 294MC camera together with guiding/dithering via the ASIAIR PRO is being a bit of a revelation. I'm still adjusting the guiding settings, but got much better figures during this session so am slowly getting things sorted. First time on this nebula...another beauty that deserves further work. Can you post up your guiding log with https://adgsoftware.com/phd2utils/ you may be doing better than you think. Roger Quote Link to comment Share on other sites More sharing options...
Sterrenland Posted August 12, 2021 Author Share Posted August 12, 2021 3 hours ago, ApophisAstros said: Can you post up your guiding log with https://adgsoftware.com/phd2utils/ you may be doing better than you think. Roger Roger...I don't think I have a guide log....I use the ASIAIR PRO which, I think, uses a cut-down version of PHD2 under the bonnet. I don't remember seeing any log collection options, though I may be wrong. When I was doing the captures for the Elephant's Trunk I was getting down to around 0.7 total error (I know you shouldn't only dwell on this figure) - not brilliant, but better than the 1.4 I was getting when doing the Pelican. Occasionally it would rise up to 1.4 - presumably when the seeing deteriorated/high clouds. I'll continue playing with the Calibration Steps, Max DEC Duration, Max RA Duration and agressiveness to attempt to improve further. Even at the stage I'm at now I'm managing much longer exposures than I was without the guiding so I'm pleased with the progress made and the dithering has had an amazing effect on getting rid of a lot of the background noise. But thanks for offering to look over the figures Roger. Quote Link to comment Share on other sites More sharing options...
AstronomyUkraine Posted August 12, 2021 Share Posted August 12, 2021 (edited) 51 minutes ago, Sterrenland said: When I was doing the captures for the Elephant's Trunk I was getting down to around 0.7 total error (I know you shouldn't only dwell on this figure) - not brilliant, but better than the 1.4 I was getting when doing the Pelican. Occasionally it would rise up to 1.4 - presumably when the seeing deteriorated/high clouds. The general rule of thumb is to have your guiding below your resolution. With my 80ED and ZWO 1600, my resolution is around 1.4, your combination is 1.59, unless you have a reducer on the scope. I would say 0.7 is excellent guiding, of course it can be improved with tweaking the mount and PHD2. I wouldn't fret too much unless your guiding goes over your resolution, you will still get round stars. Edited August 12, 2021 by AstronomyUkraine 1 Quote Link to comment Share on other sites More sharing options...
Carastro Posted August 12, 2021 Share Posted August 12, 2021 Very nice result, I like that. Carole 1 Quote Link to comment Share on other sites More sharing options...
TerryMcK Posted August 12, 2021 Share Posted August 12, 2021 Nice pic Eric. 1 Quote Link to comment Share on other sites More sharing options...
Sterrenland Posted August 12, 2021 Author Share Posted August 12, 2021 17 minutes ago, AstronomyUkraine said: The general rule of thumb is to have your guiding below your resolution. With my 80ED and ZWO 1600, my resolution is around 1.4, your combination is 1.59, unless you have a reducer on the scope. I would say 0.7 is excellent guiding, of course it can be improved with teaking the mount and PHD2. I wouldn't fret too much unless your guiding goes over your resolution, you will still get round stars. Thanks for the info...very helpful. I don't feel tooo bad now! 😀 As I said, I know there's more to the guiding than just concentrating on the total error figure, but your figures show I'm heading down the right track! Thanks...very useful. 1 Quote Link to comment Share on other sites More sharing options...
paulgrover68 Posted August 12, 2021 Share Posted August 12, 2021 An excellent image - Liking the subtle colours. 1 Quote Link to comment Share on other sites More sharing options...
P Holdsworth Posted August 12, 2021 Share Posted August 12, 2021 That's a wonderful image 👍 Paul 1 Quote Link to comment Share on other sites More sharing options...
MarkAR Posted August 14, 2021 Share Posted August 14, 2021 Lovely subtle image with really good detail. 1 Quote Link to comment Share on other sites More sharing options...
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