Apparent Position of a Star
PDF document and MATLAB script that computes the geocentric and topocentric apparent position of a star.
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PDF document and MATLAB function named apstar1.m, and a demonstration script, named demo_astar1.m that can be used to determine the apparent geocentric and topocentric coordinates of a star. The source ephemeris for this routine is a JPL binary ephemeris file. These applications use several functions ported to MATLAB from the Fortran version of the NOVAS (Naval Observatory Vector Astrometry Subroutines) source code developed at the United States Naval Observatory (www.usno.navy.mil/USNO/astronomical-applications/software-products/novas).
Requires platform-specific MICE mex file which can be downloaded from naif.jpl.nasa.gov/naif/
Cite As
David Eagle (2026). Apparent Position of a Star (https://se.mathworks.com/matlabcentral/fileexchange/39231-apparent-position-of-a-star), MATLAB Central File Exchange. Retrieved .
General Information
- Version 1.3.0.0 (29.9 MB)
MATLAB Release Compatibility
- Compatible with any release
Platform Compatibility
- Windows
- macOS
- Linux
| Version | Published | Release Notes | Action |
|---|---|---|---|
| 1.3.0.0 | Bug fix in apstar1 function. Thanks to Darral F for the catch |
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| 1.2.0.0 | Updated to use DE440s.bsp JPL ephemeris and N66 version of MICE routines. |
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| 1.1.0.0 | Script now computes the leap seconds internally. MICA example output included for comparison. |
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| 1.0.0.0 |
