The Interactive Cross-Platform
Astronomical Software Ephemeris

Version 3.5

XPM: --- Select a FTP or HTTP Mirror --- ---------- HTTP Mirrors ----------- HTTP - WW2.OSXGNU.ORG United States HTTP - FR.OSXGNU.ORG France HTTP - IT.OSXGNU.ORG Italy ----------- FTP Mirrors ----------- FTP - US.OSXGNU.ORG United States FTP - FR.OSXGNU.ORG France Version: V3.5

XEphem is a scientific-grade interactive astronomical ephemeris package. Here are some of the 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.
• offers many large databases including Tycho, Hipparcos, GSC, USNO.
• displays data in configurable tabular formats in conjunction with several interactive graphical views;
• graphically displays a 24 hour period showing when any selected objects are up;
• displays 3-D stereo views of the Solar System 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;
• can create plots of any pairs of all data fields throughout the program;
• downloads AAVSO light curves directly online;
• downloads current asteroid and comets lists from Lowell and MPC;
• downloads timely Earth satellite orbital TLE parameters;
• 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 spreadsheet for converting among equatorial, ecliptic, horizontal and galactic coordinates;
• includes a compiler for entering and solving user-written functions using any data fields;
• serves as the control point for GOTO telescopes in real-time such as Meade LX200;
• displays FITS files and DSS images overlaid with properly registered database symbols and other graphical information;
• performs automatic star pattern matching to solve for accurate World Coordinate System on any image;
• performs 1-click 2D Gaussian relative and absolute photometry;
• lets you define and save any number of Eyepieces to use in sky maps;
• displays your own local horizon profile;
• can store sets of Sky View options for easy playback later;
• uses high quality Postscript for all printing.

Thank you for your interest in XEphem.