95 Arethusa
A three-dimensional model of 95 Arethusa based on its light curve. | |
Discovery | |
---|---|
Discovered by | Karl Theodor Robert Luther |
Discovery date | 23 November 1867 |
Designations | |
Main belt | |
Orbital characteristics [1] | |
Epoch 31 July 2016 (JD 2457600.5) | |
Uncertainty parameter 0 | |
Observation arc | 143.53 yr (52424 d) |
Aphelion | 3.53176 AU (528.344 Gm) |
Perihelion | 2.59737 AU (388.561 Gm) |
3.06457 AU (458.453 Gm) | |
Eccentricity | 0.15245 |
5.36 yr (1959.5 d) | |
Average orbital speed | 16.91 km/s |
250.185° | |
0° 11m 1.385s / day | |
Inclination | 12.9955° |
243.038° | |
154.196° | |
Earth MOID | 1.61093 AU (240.992 Gm) |
Jupiter MOID | 1.8941 AU (283.35 Gm) |
Jupiter Tisserand parameter | 3.176 |
Physical characteristics | |
Dimensions |
±10.1 km 136.04 [1] 136.04 km† 147 ± 32 km [2] |
Mass | 2.6×1018 kg |
Mean density | ? g/cm³ |
Equatorial surface gravity | 0.0380 m/s² |
Equatorial escape velocity | 0.0719 km/s |
8.705 h (0.3627 d) | |
±0.012 0.0698 [1] 0.070 [3] | |
Temperature | ~159 K |
C | |
8.0 | |
|
95 Arethusa (/ˌærᵻˈθjuːzə/ ARR-ə-THEW-zə) is a large main-belt asteroid. Its coloring is dark, its composition carbonaceous and primitive. It was discovered by Robert Luther on November 23, 1867, and named after one of the various Arethusas in Greek mythology. Arethusa has been observed occulting a star three times: first on February 2, 1998, and twice in January 2003.
References
- 1 2 3 "95 Arethusa". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.
- ↑ Ďurech, Josef; Kaasalainen, Mikko; Herald, David; Dunham, David; Timerson, Brad; Hanuš, Josef; et al. (2011). "Combining asteroid models derived by lightcurve inversion with asteroidal occultation silhouettes" (PDF). Icarus. 214 (2): 652–670. arXiv:1104.4227. Bibcode:2011Icar..214..652D. doi:10.1016/j.icarus.2011.03.016.
- ↑ Asteroid Data Sets
External links
- Orbital simulation from JPL (Java) / Ephemeris
- Asteroid Occultation Results for North America on 2008/04/16 with 2 chords
- 95 Arethusa at the JPL Small-Body Database
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