139P/Väisälä–Oterma
| Discovery | |
|---|---|
| Discovered by |
Yrjö Väisälä Liisi Oterma |
| Discovery date | October 7, 1939 |
| Alternative designations | 1939 TN; 1998 WG22 |
| Orbital characteristics A | |
| Epoch | March 6, 2006 |
| Aphelion | 5.62 AU |
| Perihelion | 3.402 AU |
| Semi-major axis | 4.511 AU |
| Eccentricity | 0.2458 |
| Orbital period | 9.58 a |
| Inclination | 2.3296° |
| Last perihelion | April 19, 2008 |
| Next perihelion | December 10, 2017[1] |
139P/Väisälä–Oterma is a periodic comet in the solar system. When it was discovered in 1939 it was not recognized as a comet and designated as asteroid 1939 TN.
References
- ↑ Patrick Rocher (2009-03-21). "Note number : 0179 P/Vaisala-Oterma : 139P". Institut de mécanique céleste et de calcul des éphémérides. Retrieved 2012-02-25.
External links
- Orbital simulation from JPL (Java) / Horizons Ephemeris
- 139P/Vaisala-Oterma – Seiichi Yoshida @ aerith.net
- 139P at Kronk's Cometography
| Periodic comets (by number) | ||
|---|---|---|
| Previous 138P/Shoemaker-Levy |
139P/Väisälä–Oterma | Next 140P/Bowell-Skiff |