![]() ![]() Precess coordinates, proper motion from J2000 to B1950ĭeredden a galaxy spectrum using the Calzetti et al. Or coordinate conversions (calls EULER and PRECESS).Ĭompute components of barycentric Earth velocity, given Julian date Interactive driver to compute astronomical precession, Given a FITS header, display a "weathervane" showing N-E orientationĭisplay formatter for pixel + astronomical coordinates Miscellaneous (Non-Astronomy) Procedures Astronomical UtilitiesĬonvert air wavelengths to vacuum wavelengthsĬonvert longitude,latitude to X,Y using Aitoff equal-area projectionĬreate an overlay grid using the AITOFF projectionĬonvert Horizon (Alt-Az) coordinates to Hour Angle and Declinationĭraw an arcbar over an image showing the astronomical plate scale.FITS Header Astrometry and World Coordinate System (WCS). ![]()
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