133 Cyrene
| Discovery | |
|---|---|
| Discovered by | James Craig Watson |
| Discovery date | August 16, 1873 |
| Designations | |
|
Named after
|
Cyrene (mythology) |
| A910 NB; 1936 HO; 1948 QC; 1959 UR |
|
| Main belt | |
| Orbital characteristics[1] | |
| Epoch July 14, 2004 (JD 2453200.5) | |
| Aphelion | 522.169 Gm (3.490 AU) |
| Perihelion | 392.840 Gm (2.626 AU) |
| 457.505 Gm (3.058 AU) | |
| Eccentricity | 0.141 |
| 1953.456 d (5.35 a) | |
|
Average orbital speed
|
17.03 km/s |
| 224.793° | |
| Inclination | 7.233° |
| 319.246° | |
| 291.128° | |
| Physical characteristics | |
| Dimensions | 66.6 km |
| Mass | 3.1 × 1017 kg |
|
Mean density
|
2.0? g/cm³ |
| 0.0186 m/s² | |
| 0.0352 km/s | |
| 12.707[2] h (0.5295 d) | |
| Albedo | 0.2563[3] |
| Temperature | ~133 K |
|
Spectral type
|
S[3] |
| 7.990[4] | |
133 Cyrene is a fairly large and very bright main-belt asteroid that was discovered by J. C. Watson on August 16, 1873, and named after Cyrene, a nymph, daughter of king Hypseus and beloved of Apollo in Greek mythology.[5] It is classified as an S-type asteroid based upon its spectrum. It is listed as a member of the Hecuba group of asteroids that orbit near the 2:1 mean-motion resonance with Jupiter.[6]
In the Tholen classification system, it is categorized as a stony SR-type asteroid.[7] Photometric observations of this asteroid at the Altimira Observatory in 1985 gave a light curve with a period of 12.707 ± 0.015 hours and a brightness variation of 0.22 in magnitude. This result matches previous measurements reported in 1984 and 2005.[2]
References
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 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.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found. See appendix A.
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