John Pane
John Pane created a new topic ' Does Ekos record camera rotation correctly?' in the forum. 2 years ago

I have a ZWO ASI6200MC camera. For a recent image, the FITS file contained an astrometric solution and also notes that the data are to be interpreted top-down. FITS header excerpt:

ROWORDER= 'TOP-DOWN'           / Row Order
RA      =         2.336768E+01 / Object J2000 RA in Degrees                     
DEC     =         3.063624E+01 / Object J2000 DEC in Degrees                       
CROTA1  =     2.4249720376E+02 / CROTA1                                         
CROTA2  =     2.4249720376E+02 / CROTA2                                         
This implies a camera rotation of 360-242 = -118 degrees. In fact, this is what PixInsight reports when it reads in the image.

Later, when I plate solve using PixInsight, I get a rotation angle of -62 degrees. -118 + -62 = -180 degrees (mirrored vertically).

Is Ekos recording the astrometric solution as if the image is written bottom-up instead of top-down?

Thanks,
John
 

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