_Iphigenia.png) 3D convex shape model of 112 Iphigenia | |
| Discovery | |
|---|---|
| Discovered by | Christian Heinrich Friedrich Peters |
| Discovery date | 19 September 1870 |
| Designations | |
| (112) Iphigenia | |
| Pronunciation | /ˌɪfɪdʒɪˈnaɪə/[1] |
Named after | Iphigenia |
| A870 SA | |
| Main belt | |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 145.57 yr (53169 d) |
| Aphelion | 2.7461 AU (410.81 Gm) |
| Perihelion | 2.12225 AU (317.484 Gm) |
| 2.43415 AU (364.144 Gm) | |
| Eccentricity | 0.12813 |
| 3.80yr (1387.1d) | |
Averageorbital speed | 19.01 km/s |
| 169.984° | |
| 0° 15m 34.308s / day | |
| Inclination | 2.6029° |
| 323.538° | |
| 16.676° | |
| Earth MOID | 1.11284 AU (166.478 Gm) |
| Jupiter MOID | 2.60275 AU (389.366 Gm) |
| TJupiter | 3.493 |
| Physical characteristics | |
| Dimensions | 72.18±4.4 km[2] 71.07 ± 0.52 km[3] |
| Mass | (1.97 ± 6.78) × 1018 kg[3] |
Meandensity | 10.48 ± 36.06 g/cm3[3] |
Equatorialsurface gravity | 0.0202 m/s² |
Equatorialescape velocity | 0.0382 km/s |
| 31.466 h (1.3111 d)[2][4] | |
| 0.0393±0.005 | |
| Temperature | ~178K |
| C | |
| 9.84 | |
112 Iphigenia is a fairly large and exceedingly darkmain-beltasteroid. It is classified as aC-type asteroid, and therefore probably has a primitivecarbonaceous composition. It was discovered by German-American astronomerC. H. F. Peters on September 19, 1870, and named afterIphigenia, a princess sacrificed by her father inGreek mythology. Theorbital elements for 112 Iphigenia were published byGerman astronomerFriedrich Tietjen in 1871.[5]
This body is orbiting theSun with aperiod of 3.80 years and aneccentricity of 0.13. Theorbital plane isinclined by 2.6° to theplane of the ecliptic. 112 Iphigenia has a cross-section diameter of ~72 km.Photometric observations of this asteroid during 2007 at theObservatorio Astronómico de Mallorca were used to create alight curve plot, which was published in 2010. This showed a relatively longsynodicrotation period of31.385±0.006 hours (1.3 days) and a brightness variation of0.30±0.02magnitude during each cycle.[6] These findings agree with independent results reported in 2008, which gave a period of31.466±0.001 hours.[4]
