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CHARON astrometry software Find_Orb Index
Contact info Jovian events Assorted calendar systems
Asteroid observer tools Easter dates/patterns C/C++ source code
On-line orbit determination Current NEOCP summary Miscellaneous orbital elements
On-line satellite ID PDCursesMod library PSudoku puzzle generator
Navigation satellites for timing images Guide user manual (HTML) Guide user manual (PDF)
Tools for asteroid observers Privacy policy

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Click here for information about the Chang'e 5-T1 rocket booster hitting the far side of the moon.

This site last updated 2023 September 27.

About Project Pluto: Project Pluto supplies astronomical software, both commercial and freeware, to amateur and professional astronomers, such as the Find_Orb orbit determination software (takes a set of positional measurements of an asteroid, comet, or natural or artificial satellite, and determines its orbit); Sat_ID (identifies artificial satellites given data on where and when you saw them); Integrat (integrates orbital elements from one epoch to another), and various other tools. As you will see, free on-line versions of some of of the tools are available.

Information about the Guide DVD Star Charting software

Click here for information on ordering Guide 9.1. If you already have the Guide 9.0 DVD, you can click here for a free update to Guide 9.1. The update includes a few improvements and bug fixes to the software, and is highly recommended.

Click here for an HTML version of the Guide users manual.

Contact information

Project Pluto
168 Ridge Road
Bowdoinham ME 04008
tel (207) 666 5750
tel (800) 777 5886 (1-800-PR-PLUTO)
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Copyright 1996-2023 Project Pluto.