AR2887 in high resolution

[GreatAttractor]

My results from Sunday (using Lunt 50 etalon; all stacked in AS!3 and processed with ImPPG). Note: you can enable animation looping; right-click them and chose "Loop".

90 mm refractor, Chameleon 3 (ICX445), poor seeing:

A small surge (?) (30-second intervals, 0:30 h total):

Off-band (with a slightly detuned etalon); I like how everything seems to be more lively (30-second intervals, 0:24 h total):

 

In the morning, when the seeing was better, I was using the RC8 setup. The results are better than last time, but I don't know yet what helped the most:

 

• better seeing overall, for longer periods (didn't have the SSM with me)
• more frames to stack thanks to a faster camera
• replacing the Lunt's dyed-glass mini-ERF with Baader 35 nm Hα filter (as suggested by @Kitsunegari, thanks!); maybe I was indeed having thermal issues before

 

I shot two animations, with the Chameleon (35 fps) and the Blackfly S (IMX273, 90 fps). The first yielded just a few good stacks (but that could be due to variable seeing), e.g.:

 

 

The best stacks of the second animation were similar or slightly better:

 

 

And the animation (nothing of note happened, unfortunately); 20-second intervals, 0:55 h total:

Slightly more aggresive processing:

 

Edited October 25, 2021 by GreatAttractor

[Pete Presland]

Very nicely captured