An other thing you should check is binning. The height of the image send for solving should be 1000 pixels or more. So reduce binning accordingly.
Checklist for reliable solving:
ASTAP behaves differently then Astrometry.net. As long you adapt the settings for that , it will work fine:
- Resolution, the image height should be 1000 pixels or more. So adapt (decrease) binning.
- Stars shall be pretty round and reasonable in focus.
- FOV (field of view) shall be specified within 5 % accuracy for maximum reliability but detection is possible if FOV is 30 or 40% off. So set telescope focal ratio, sensor/pixel size correctly in INDI.
- A minimum of about 20 to 30 stars should be visible (this could be just above noise level. Exposure time of 1 or 2 seconds can work)
- Image shall not be severely saturated or stretched. RAW images works best.
The FOV is detected from the values in the FITS header. To check the FOV, start ASTAP from the applications menu Education and open an unsolved image in the ASTAP viewer. The image dimensions in degrees will be shown in the ASTAP status bar and are updated as soon you solve the image. If the dimensions change a lot (more then 5%) you better update the focal length and or sensor size settings in INDI.
The image dimensions are indicated in the
popup notifier
which is show as soon the solver is 2 degrees from the starting point:
Popup notifier indicating 2328x1760 pixels
Han