Hi, sorry if this is a common issue/question that comes up.
question: is there something wrong with how I am using Siril’s photometric color calibration function vs is there just too much distortion in my image?
background:
canon 5d2, 50mm f/1.8, barndoor tracker
lights = 20s exposure, iso 1600 x 19
darks x 20
bias x 30
flats x 20
following the well-written manual pre-processing tutorial and using the whole image processing tutorial to finish up
problem:
when attempting to use photometric color calibration, plate-solving keeps on failing.
what i’ve tried:
- using nova.astrometry.net to find RA & dec of center of image
- manually selecting stars according to those found on astrometry.net
- running PCC on cropped areas with center at stars found according to astrometry.net
I’ve included the processed FITS of my stacked lights and the astrometry.net mapping
FITS image: 241.92 MB file on MEGA
astrometry.net results:
7.23 MB file on MEGA
Calibration
| Center (RA, Dec): | (262.772, -29.435) |
|---|---|
| Center (RA, hms): | 17h 31m 05.380s |
| Center (Dec, dms): | -29° 26’ 07.648" |
| Size: | 37.4 x 22.9 deg |
| Radius: | 21.936 deg |
| Pixel scale: | 25.6 arcsec/pixel |
| Orientation: | Up is 26 degrees E of N |
thanks,
eric