precession

[Mark Copper]

Hello Dustin and all,

Although I interface to my telescope through Kstars/Ekos, my Ekos
astrometry module has been broken for some time. Consequently, I've
been using solve-field from the command line which is fine. But to use
the solve-field output in Ekos, I need to precess the J2000
coordinates. So I run a little Astropy script to do that which for
some reason I do not understand itself takes several seconds.

Does anyone have a favorite way to precess solve-field output?

Thanks.

Mark Copper

[Shen Ming]

I guess you have written a for loop to calculate the whole list outputted by astrometry,

if that, please try to pass the J2000 coordinates in array to the astropy SkyCoord function, that should boost up the performance.