| Acronym | Meaning |
 | CELSS | Controlled Ecological Life Support System |
| HJD | Helicentric Julian Date |
| HDE | Henry Draper Extension |
| BBXRT | Broad-Band X-Ray Telescope |
| PPM | Positions And Proper Motions (catalog) |
| SST | Spectroscopic Survey Telescope / SuperSonic Transport |
| CNES | Centre National D'Etude Spatiales |
| WIYN | Wisconsin/Indiana/Yale/NOAO Telescope |
| IMU | Inertial Measurement Unit |
| ATM | Amateur Telescope Maker |
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