Hello astro friends,
I have a question about Polar Alignment with a ZWO AM5N in combination with ASIAIR PRO.
I have the AM5N with the standard ZWO TC40 tripod (including ZWO PE200 Pier extension 200mm) and about 5 to 10 kilos of ballast in the bag, standing on a stone floor.
The mount is aligned to the north and the GPS settings in ASIAIR are correct. The altitude is set, the guidescope (Askar 52mm Super ED with a ZWO 290mini) is focused. My main scope is a Zwo FF107 with a ZWO2600MC and is centered on the mount.
I have no cable snag and everything is free to move.
I start my Polar Alignment and make sure the result is approximately 15 to 20 seconds. In other words, green happy face . Then I send the mount to the “home” position via the ASIAIR menu and start the Polar Alignment again. After the platesolve and rotation, I suddenly see that the result deviates by 3 to 5 minutes from my previous result, which was 20 seconds.
The 2 nd PA is directly after the first. There has been no further contact with the mount and there is no cable snag. I do not understand how, after a 1 st PA with a result of about 20 seconds total error, a 2 nd PA immediately following the first PA suddenly deviates by minutes. That does not seem correct, does it?
I use the “normal PA” procedure in the ASIAIR.
As a test, I have also tried the “all sky polar alignment” procedure in ASIAIR (under the i icon). Here, too, a second polar alignment gives a different result compared to the first, but it is not as large as with the normal PA procedure. However, I read online that this “all sky” PA is less accurate than the normal one, so I would prefer to just use the normal PA.
My guiding is about “0.6 to 0.8” but still I do not understand why a second PA deviates so much from the first PA.
Does anyone have any idea what I can do?
