Preprocess and Comet Tracking

Image processing, astrometry, photometry, etc.
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TimH
Posts: 1
Joined: 07 Nov 2021, 10:35

Preprocess and Comet Tracking

Post by TimH » 07 Nov 2021, 11:04

Im looking for advice on tracking. I go through what i think is the procedure, but the object motion and stars are trailed. This what i do ( in AA8 demo, and AA5 ):

Open files (average), Align>Auto>Star pattern, Follow minor planet checked, sky motion= 2,2"/px, in PA 86 (manual entry from the MP Ephemeris Service), OK.

What im not sure, is how AA knows the orientation of the image and if im missing a step here.

Thanks very much for tips.

Dunmunro
Posts: 126
Joined: 10 Jan 2019, 01:11

Re: Preprocess and Comet Tracking

Post by Dunmunro » 08 Nov 2021, 02:15

TimH wrote:
07 Nov 2021, 11:04
Im looking for advice on tracking. I go through what i think is the procedure, but the object motion and stars are trailed. This what i do ( in AA8 demo, and AA5 ):

Open files (average), Align>Auto>Star pattern, Follow minor planet checked, sky motion= 2,2"/px, in PA 86 (manual entry from the MP Ephemeris Service), OK.

What im not sure, is how AA knows the orientation of the image and if im missing a step here.

Thanks very much for tips.
You should see the stars trailed, but not the minor planet.

fabdev
Posts: 285
Joined: 03 Dec 2018, 21:43

Re: Preprocess and Comet Tracking

Post by fabdev » 08 Nov 2021, 03:24

The orientation of the image must be set in the Observer page (Pixel scale / Angle) of the Options.
It can be found with a plate solve, then Statistics.

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