XEphem 3.7.5

A free interactive astronomy program for UNIX systems with X & Motif.
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XEphem project is a scientific-grade interactive astronomical ephemeris package.

Main features:

  • computes heliocentric, geocentric and topocentric information for all objects;
  • has built-in support for all planets; the moons of Mars, Jupiter, Saturn, Uranus and Earth; central meridian longitude of Mars and Jupiter; Saturn's rings; and Jupiter's Great Red Spot;
  • allows user-defined objects including stars, deepsky objects, asteroids, comets and Earth satellites.
  • provides special efficient handling of large catalogs including Tycho, Hipparcos, GSC.
  • displays data in configurable tabular formats in conjunction with several interactive graphical views;
  • displays a night-at-a-glance 24 hour graphic showing when any selected objects are up;
  • displays 3-D stereo Solar System views that are particularly well suited for visualizing comet trajectories;
  • quickly finds all close pairs of objects in the sky;
  • sorts and prints all catalogs with very flexible criteria for creating custom observing lists;
  • creates plots of any pairs of all data fields throughout the program;
  • downloads and displays AAVSO light curves directly online;
  • downloads current asteroid and comets ephemerides from Lowell Observatory and Minor Planet Center;
  • downloads timely Earth satellite orbital TLE parameters;
  • plots true binary system orbits;
  • downloads Digitized Sky Survey FITS files from STScI or ESO;
  • displays seti@home client progress and plots position being processed on Sky View map;
  • provides a handy coordinates spreadsheet for converting among equatorial, ecliptic, horizon and galactic frames ;
  • displays live SOHO images of the Sun;
  • includes a compiler for entering and solving user-written functions using any data fields;
  • serves as the control point for GOTO telescopes such as Meade LX200 or other external applications;
  • displays FITS files images overlaid with database symbols and other graphical information;
  • performs automatic star pattern matching to automatically solve for World Coordinate System on any image;
  • performs 1-click 2D Gaussian relative and absolute photometry;
  • defines and saves any number of Eyepieces to use in sky maps;
  • captures, displays and clips to any number of local horizon profiles;
  • stores sets of all Sky View options in history sets for easy playback later;
  • prints using high quality Postscript;
  • allows you to assign any number of objects as Favorites for special fast access throughout the program, and makes them available even when their original databases are no longer loaded;
  • provides an extensible image gallery initialized with over 300 beautiful and informative color images of deep sky objects;
  • provides an observing logbook which is automatically filled in with observing circumstances, with searching on most fields;
  • displays magnetic deviation for any location.

last updated on:
July 26th, 2011, 12:52 GMT
license type:
Free for non-commercial use
developed by:
Elwood Charles Downey
ROOT \ Science and Engineering \ Astronomy
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