Stacked this morning using
Regards
Graeme
Moderator: kt4hx
Larry 1969 wrote: ↑Sat May 16, 2020 2:05 pm First, nice M101! Thanks for sharing!
I've considered the meridian flip as well but I came up with this approach and it works well enough for me... Maybe give this a try?
As my target approaches the meridian, I park and cover telescope and shoot dark and bias frames... This takes long enough that my target is past the meridian so I just get back on it and chase it down.
Larry
bobharmony wrote: ↑Sat May 16, 2020 2:43 pm Nice M101 with so little data. This is one target that really benefits from a lot of exposure time!
About APT and the meridian flip, it is a little confusing to figure out the settings but it works very well once all of that gets figured out. The plate solving that occurs after the flip frames the target beautifully, just a few pixels at most off from the pre-flip frames. These are the settings I use for Session Craft to manage the flips:
The negative number in the "Flip Moment" tells APT to do the flip 5 minutes after passing the meridian, along with leaving the "Delay is counted after meridian flip" box UNCHECKED. It took me a few attempts to finally get that figured out! Previous attempts had stopped imaging pref-flip and waiting idle for a longer period of time before flipping and resuming the session.
Oh, don't forget to check the "Make Automatic Flip" box when you are ready to go
Bob
It works well enough for me and no. No need to rotate your images before stacking.Graeme1858 wrote: ↑Sat May 16, 2020 6:14 pm Sounds like a nice simple strategy. I'll give it a go.
Then is it just a case of flipping the post meridian images so they all match before stacking?
Cheers.
Very interesting values in Sessioncraft Bob. I started having issues with thebobharmony wrote: ↑Sat May 16, 2020 2:43 pm Nice M101 with so little data. This is one target that really benefits from a lot of exposure time!
About APT and the meridian flip, it is a little confusing to figure out the settings but it works very well once all of that gets figured out. The plate solving that occurs after the flip frames the target beautifully, just a few pixels at most off from the pre-flip frames. These are the settings I use for Session Craft to manage the flips:
session craft JPG.JPG
The negative number in the "Flip Moment" tells APT to do the flip 5 minutes after passing the meridian, along with leaving the "Delay is counted after meridian flip" box UNCHECKED. It took me a few attempts to finally get that figured out! Previous attempts had stopped imaging pref-flip and waiting idle for a longer period of time before flipping and resuming the session.
Oh, don't forget to check the "Make Automatic Flip" box when you are ready to go
Bob
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