| 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 | 3.9674 AU (593.51 Gm) |
| Perihelion | 0.35068 AU (52.461 Gm) |
| 2.1590 AU (322.98 Gm) | |
| Eccentricity | 0.83757 |
| 3.17 yr (1158.8 d) | |
| 272.08° | |
| 0° 18m 38.412s / day | |
| Inclination | 11.558° |
| 27.569° | |
| 2023-Feb-26 2019-Dec-25 (previous) | |
| 209.33° | |
| Earth MOID | 0.11610 AU (17.368 Gm) |
| Physical characteristics | |
| Dimensions | ~6 km[1] |
| 2.85 km | |
| 20 h (0.83 d)[1] | |
| SG[1] | |
| 13.87[1] | |
2212 Hephaistos (1978 SB) is anApollo asteroid and aNEO discovered on 27 September 1978 byL. I. Chernykh at theCrimean Astrophysical Observatory. It is named after theGreek godHephaestus. It is the largest member of the Hephaistos asteroid group. It makes close approaches to all of the inner planets and will pass 0.048 AU (7.2 million km) fromMercury on 2032-Sep-16.[1]
Other potential members of the Hephaistos group include(85182) 1991 AQ,4486 Mithra, and D/1766 G1 (Helfenzrieder).[2]
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