331P/Gibbs
331P/Gibbs (P/2012 F5) is a small periodic Encke-type and rare main-belt comet, discovered by American amateur astronomer Alex Gibbs.
| Discovery | |
|---|---|
| Discovered by | A. R. Gibbs (Mount Lemmon Survey) |
| Discovery date | March 22, 2012 |
| Orbital characteristics | |
| Epoch | 4 February 2012 (JD 2455961.5) |
| Observation arc | 11.3 years |
| Number of observations | 148 |
| Aphelion | 3.130 AU |
| Perihelion | 2.877 AU |
| Semi-major axis | 3.004 AU |
| Eccentricity | 0.042 |
| Orbital period | 5.21 years (1902 days) |
| Inclination | 9.740° |
| Last perihelion | 29 September 2020 16 June 2015 |
| Next perihelion | 2025-Dec-25 |
| TJupiter | 3.229 |
| Earth MOID | 1.88 AU |
| Jupiter MOID | 2.08 AU |
| Physical characteristics | |
| Dimensions | ~2-5 km |
| Comet total magnitude (M1) | 12.3 |
| Comet nuclear magnitude (M2) | 15.4 |
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