astrocal
Currently Included Events:
- Terran apsides, equinoxes, and solstices
- Martian launch windows
- Conjunctions between planets, or a planet and the sun (incl. occultations)
- Besiegements
- Retrograde/Prograde motions
- New and full moons (incl. eclipses)
- "Supermoons", here defined as a full moon with a geocentric distance less than 360 Mm
- Transits
- Maximum elongations of Venus and Mercury