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# pkg_add libnova
> astronomic computations as a library
Maintainer: The OpenBSD ports mailing-list <ports at openbsd dot org>
libnova is a general purpose, double precision, Celestial Mechanics, Astrometry and Astrodynamics library. Currently computes: * Aberration * Nutation * Apparent Position * Dynamical Time * Julian Day * Precession * Proper Motion * Sidereal Time * Solar Coordinates (using VSOP87) * Coordinate Transformations * Planetary Positions Mercury - Pluto (Mercury - Neptune using VSOP87) * Planetary Magnitude, illuminated disk and phase angle. * Lunar Position (using ELP82), phase angle. * Elliptic Motion of bodies (Asteroid + Comet positional and orbit data) * Asteroid + Comet magnitudes * Parabolic Motion of bodies (Comet positional data) * Orbit velocities and lengths * Atmospheric refraction * Rise, Set and Transit times. * Semidiameters of the Sun, Moon, Planets and asteroids. * Angular separation of bodies * Hyperbolic motion of bodies
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