85P/Boethin
| Discovery | |
|---|---|
| Discovered by | Leo Boethin |
| Discovery date | January 4, 1975 |
| Alternative designations | 85P/1975 A1; 1975 I; 1975a; 85P/1985 T2; 1986 I; 1985n |
| Orbital characteristics A | |
| Epoch |
January 10, 1986 (JD 2446440.5) |
| Aphelion | 20.7560 AU |
| Perihelion | 1.1143 AU |
| Semi-major axis | 11.67560 AU |
| Eccentricity | 0.7777 |
| Orbital period | 11.225 a |
| Inclination | 5.756° |
| Last perihelion | December 16, 2008[1] (unobserved) |
| Next perihelion | 2020 (lost?) |
Comet Boethin (officially 85P/Boethin) is a periodic comet discovered in 1975 by Leo Boethin. It appeared again in 1986 January as expected. Although the comet was next expected at perihelion on 1997 April, no observations were reported.
It was to be a target of NASA's EPOXI comet-exploration mission in December 2008; however, the comet was not recovered in time to set up the trajectory for the flyby with sufficient accuracy. It is thought that the comet may have broken into pieces too small for visual detection.[2]
References
- ↑ Syuichi Nakano (2005-07-26). "85P/Boethin (NK 1210)". OAA Computing and Minor Planet Sections. Retrieved 2012-02-18.
- ↑ NASA and the Case of the Missing Comet
External links
- Orbital simulation from JPL (Java) / Horizons Ephemeris
- 85P/Boethin – Seiichi Yoshida @ aerith.net
- 85P past, present and future orbital elements
- Destination: Missing--Comet Once Targeted by NASA Mission Vanished (Scientific American – October 23, 2012)
- "Deep Impact Flyby Spacecraft Ready For New Mission" (from space.com, July 14, 2005)
- 85P/Boethin history (from cometography.com)
| Periodic comets (by number) | ||
|---|---|---|
| Previous 84P/Giclas |
85P/Boethin | Next 86P/Wild |