get-healpix - Man Page

get-healpix [options] ra dec
get-healpix [options] x y z

-r

RA/DEC values in radians; default is in decimal degrees or H:M:S

-H healpix

take healpix number as input and print center as output.

-N n

Nside (default 1)

-n

Print neighbours

-R range

print healpixes within radius range in degrees

-p

Project position within healpix

If your values are negative, add "--" in between "-r" (if you're using it) and "ra" or "x".

The Astrometry.net team. Principal investigators are David W. Hogg (NYU) and Dustin Lang (CMU).

http://astrometry.net