FK4 precession warning

[Shen Ming]

Dear Dustin Lang:

    Recently when I solved a pack of fits file, some field showed warning like this:

> WARNING: FK4 precession formulae not yet implemented:
            Astrometry may be slightly inaccurate

    As I know, astrometry do not use proper motion to calculate apparent positions.

    My question is: When and what will trigger this warning?

Thanks

SHEN Ming

 

[Dustin Lang]

Hi,

I think you must be using some wrapper or other software that is printing that warning -- the astrometry.net package never deals with FK4 or precession at all.

cheers,

dustin

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