2212 Hephaistos
2212 Hephaistos (1978 SB) is an Apollo asteroid and a NEO discovered on 27 September 1978 by L. I. Chernykh at the Crimean Astrophysical Observatory. It is named after the Greek god Hephaestus. It is the largest member of the Hephaistos asteroid group.
| Discovery | |
|---|---|
| Discovered by | Lyudmila Chernykh |
| Discovery site | Crimean Astrophysical Observatory |
| Discovery date | 27 September 1978 |
| Designations | |
| (2212) Hephaistos | |
| Pronunciation | /hɛˈfeɪstɒs/ |
Named after | Hephaestus |
| 1978 SB | |
| Orbital characteristics[1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 41.13 yr (15022 days) |
| Aphelion | 3.96741328 AU (593.516579 Gm) |
| Perihelion | 0.35068065 AU (52.461079 Gm) |
| 2.159046967 AU (322.9888290 Gm) | |
| Eccentricity | 0.83757618 |
| 3.17 yr (1158.8 d) | |
| 272.0812839243940° | |
| 0° 18m 38.442s / day | |
| Inclination | 11.5582329° |
| 27.569039° | |
| 209.3347492572090° | |
| Earth MOID | 0.116104 AU (17.3689 Gm) |
| Physical characteristics | |
| Dimensions | 6.64 km[2] |
Mean radius | 2.85 km |
| 20 h (0.83 d)[1] | |
| SG[1] | |
| 13.87[1] | |
References
- "2212 Hephaistos (1978 SB)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 15 April 2016.
- "NEODyS 2012 Hephaistos". Near Earth Objects – Dynamic Site. Retrieved 18 March 2014.
External links
- 2212 Hephaistos at NeoDyS-2, Near Earth Objects—Dynamic Site
- Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
- 2212 Hephaistos at the JPL Small-Body Database
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