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On Thu, Feb 17, 2011 at 7:58 AM, Malcolm J. Currie <[log in to unmask]> wrote: >> I was also surprised it needed radians but I'm not sure whether it's >> autoastrom that is requiring that. > > Indeed. Autoastrom invokes ASTROM, which accepts sexagesismal format (cf. > SUN/5). Luca: are you sure that it's asking for radians not say decimal > hours for right ascension and decimal degrees for declination? Tobias: did > you try setting the plate centre in sexagesimal formats HH:MM:SS.S and > [+-]DD:MM:SS? According to SUN/242 (which you'll eventually get to by doing a `perldoc autoastrom`) you'd find information about the --obsdata option, which allows you to supply observational metadata such as RA and Dec. Both RA and Dec can be given in colon-separated HMS/DMS or decimal degrees. I didn't change this from the original implementation of autoastrom as it had to remain API-compatible so it would work with GAIA, and I'd be very surprised if this had changed in the past year. Cheers, Brad.