Naval Observatory Vector Astrometry Subroutines

NOVAS
Developer(s)United States Naval Observatory
Stable release
C3.1 (C version); F3.1 (Fortran version); Python Edition 3.1.1 / March 31, 2011 (C); March 31, 2011 (FORTRAN); October 13, 2015 (Python)
Written inC/Fortran/Python
PlatformCross-platform (distributed in source code form)
TypeAstrometry
Websiteaa.usno.navy.mil/software/novas/novas_info.php

The Naval Observatory Vector Astrometry Software (NOVAS) is a software library for astrometry-related numerical computations. It is developed by the Astronomical Applications Department, United States Naval Observatory. Currently, NOVAS has three different editions, for C, Fortran, and Python.