137 Meliboea
| Discovery | |
|---|---|
| Discovered by | Johann Palisa |
| Discovery date | April 21, 1874 |
| Designations | |
| 1958 UE, 1962 GB, A923 FA | |
| Main belt, meliboea family | |
| Orbital characteristics[1] | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 569.016 Gm (3.804 AU) |
| Perihelion | 364.057 Gm (2.434 AU) |
| 466.536 Gm (3.119 AU) | |
| Eccentricity | 0.220 |
| 2011.587 d (5.51 a) | |
|
Average orbital speed
|
16.66 km/s |
| 314.941° | |
| Inclination | 13.418° |
| 202.446° | |
| 106.741° | |
| Physical characteristics | |
| Dimensions | 145.92 ± 3.58[2] km |
| Mass | (7.27 ± 3.07) × 1018[2] kg |
|
Mean density
|
4.46 ± 1.91[2] g/cm3 |
| 0.0406 m/s² | |
| 0.0769 km/s | |
| 25.676[1][3] h | |
| Albedo | 0.0492 ± 0.0128[4] |
| Temperature | ~158 K |
|
Spectral type
|
C[4] (Tholen) |
| 8.10[4] | |
137 Meliboea is a large, dark main-belt asteroid that was discovered by Austrian astronomer J. Palisa on April 21, 1874, the second of his many asteroid discoveries, and named after one of the three Meliboeas in Greek mythology. The largest body in the Meliboea family of asteroids that share similar orbital elements, only 791 Ani approaches its size. It is classified as a C-type asteroid and may be composed of carbonaceous materials.
Photometric observations of this asteroid made at the Torino Observatory in Italy during 1990–1991 were used to determine a synodic rotation period of 15.28 ± 0.02 hours.[5] A 2009 study at the Organ Mesa Observatory in Las Cruces, New Mexico found a period of 25.676 ± 0.001 hours and a brightness variation of 0.16 ± 0.02 in magnitude. They ruled out a period of 15 hours determined in previous studies.[3]
During 2002, 137 Meliboea was observed by radar from the Arecibo Observatory. The return signal matched an effective diameter of 144 ± 16 km. This is consistent with the asteroid dimensions computed through other means.[6]
References
- ↑ 1.0 1.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 2.2 Lua error in package.lua at line 80: module 'strict' not found. See Table 1.
- ↑ 3.0 3.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 4.0 4.1 4.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
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