118 Peitho
| Discovery | |
|---|---|
| Discovered by | Karl Theodor Robert Luther |
| Discovery date | March 15, 1872 |
| Designations | |
|
Named after
|
Peitho |
| Main belt | |
| Orbital characteristics[1] | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 424.156 Gm (2.835 AU) |
| Perihelion | 304.927 Gm (2.038 AU) |
| 364.541 Gm (2.437 AU) | |
| Eccentricity | 0.164 |
| 1389.411 d (3.80 a) | |
|
Average orbital speed
|
18.95 km/s |
| 224.181° | |
| Inclination | 7.743° |
| 47.743° | |
| 33.655° | |
| Physical characteristics | |
| Dimensions | 41.7 km |
| Mass | 7.6×1016 kg |
| 0.0117 m/s² | |
| 0.0220 km/s | |
| 7.823[2] h | |
| Temperature | ~178 K |
|
Spectral type
|
S |
| 9.14 | |
118 Peitho is a main-belt asteroid. It is probably an S-type asteroid. It was discovered by R. Luther on March 15, 1872, and named after one of the two Peithos in Greek mythology. There have been two observed Peithoan occultations of a dim star: one was in 2000 and the other in 2003.[3][4]
In 2009, Photometric observations of this asteroid were made at the Palmer Divide Observatory in Colorado Springs, Colorado. The resulting asymmetrical light curve shows a synodic rotation period of 7.823 ± 0.002 hours with a brightness variation of 0.15 ± 0.02 in magnitude. This was reasonably consistent with independent studies performed in 1980 (7.78 hours) and 2009 (7.8033 hours).[2]
References
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