Astronomy: time and position functions, misc. utilities


Collection of time, position, and utility functions for astronomy: Julian and Modified Julian Day transformations, J2000/B1950 coordinate transformations, GMST at 0h from UT, UT to LST and hour angle, angular unit transformations and distance, etc. Precision generally at the level of a millisecond in time for JD, 0.1 s for LST, and a few tenths of an arcsecond in position for B2000-J1950 and vice versa. Additional functions include flux from thermal disk-shaped source, and others. Functions were originally assembled to support single-dish radio astronomy planning and observations. Cosmology-related functions are in the cosmoFns package.


Package: astroFns
Type: Package
Version: 4.1-0
Date: 2012-09-19
License: GPL (>=2)
LazyLoad: yes


Andrew Harris Maintainer: Andrew Harris <>

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