Project Pluto
Project Pluto Click here to search the Project Pluto site
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.
This software is still available, and many still think quite well of it. But development stopped circa 2015, and it is gradually becoming obsolete. You should consider alternatives. With that warning :
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.