XEphem A free interactive astronomy program for UNIX systems with X & Motif.
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interactive astronomy astronomy program astronomical ephemeris XEphem

XEphem Description

A free interactive astronomy program for UNIX systems with X & Motif. XEphem project is a scientific-grade interactive astronomical ephemeris package. Here are some key features of "XEphem": · 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.

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