112 Iphigenia
| Discovery | |
|---|---|
| Discovered by | Christian Heinrich Friedrich Peters |
| Discovery date | 19 September 1870 |
| Designations | |
| MPC designation | (112) Iphigenia |
|
Named after
|
Iphigenia |
| Main belt | |
| Orbital characteristics | |
| 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 |
| 3.80 yr (1387.1 d) | |
|
Average orbital 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) |
| Jupiter Tisserand parameter | 3.493 |
| Physical characteristics | |
| Dimensions |
72.18±4.4 km 71.07 ± 0.52 km |
| Mass | (1.97 ± 6.78) × 1018 kg |
|
Mean density
|
10.48 ± 36.06 g/cm3 |
|
Equatorial surface gravity
|
0.0202 m/s² |
|
Equatorial escape velocity
|
0.0382 km/s |
| 31.466 h (1.3111 d) | |
| 0.0393±0.005 | |
| Temperature | ~178 K |
| C | |
| 9.84 | |
112 Iphigenia /ɪfᵻdʒᵻˈnaɪ.ə/ is a fairly large and exceedingly dark main-belt asteroid. Based upon a classification as a C-type asteroid, it has probably a primitive carbonaceous composition. It was discovered by German-American astronomer C. H. F. Peters on September 19, 1870, and named after Iphigenia, the princess sacrificed by her father in Greek mythology. The orbital elements for 112 Iphigenia were published by German astronomer Friedrich Tietjen in 1871.
Photometric observations of this asteroid during 2007 at the Observatorio Astronómico de Mallorca were used to create a light curve plot, which was published in 2010. This showed a relatively long synodic rotation period of 31.385 ± 0.006 hours (1.3 days) and a brightness variation of 0.30 ± 0.02 magnitude during each cycle. These findings agree with independent results reported in 2008, which gave a period of 31.466 ± 0.001 hours.
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