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Perigee 1.12.0
Added
- Comets in the solar system view. Tick Show the comets to draw and list 20 comets: famous ones (Halley, Encke, Tempel 1, Pons-Brooks, Olbers, 29P, 67P/Churyumov-Gerasimenko, Hartley 2, Hale-Bopp, Tsuchinshan-ATLAS) and current telescope targets (10P/Tempel 2, 88P/Howell, 161P/Hartley-IRAS, 169P/NEAT, 220P/McNaught, Bernardinelli-Bernstein, Bok, two ATLAS comets, Leonard).
- Positions come from JPL Horizons, which follows each comet with the planets' pull; the list is sorted by estimated brightness.
- Each comet shows its orbit (open orbits included) and illustrative ion and dust tails that point away from the Sun and grow near it.
- The info panel gives the designation, discovery, nucleus size, perihelion distance, eccentricity, inclination, period, last and next perihelion, distances to the Sun and the Earth, an estimated magnitude (from Horizons' brightness law: comets often stray from it) and student notes in English and French. 15 comets come with a freely licensed photo, such as 67P seen by Rosetta.
- Links:
comets=1draws them,sel=comet:<id>selects one.
Maintenance
- The daily JPL Horizons run also fetches the comets (one request each).
- The weekly audit suggests comets nearing perihelion from JPL's small-body database, for the maintenance agent to add.
AI assistants: perigee-mcp 1.7.0 knows the comets (comet:<id> in perigee_find, perigee_object, perigee_state, perigee_distance; perigee_describe_view reads comets=1).
Educational use only — not intended for navigation or conjunction assessment.