95 Arethusa
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Discovery
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| Discovered by | Karl Theodor Robert Luther |
| Discovery date | November 23, 1867 |
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Designations
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| Minor planet category |
Main belt |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 527.303 Gm (3.525 AU) |
| Perihelion | 390.547 Gm (2.611 AU) |
| Semi-major axis | 458.925 Gm (3.068 AU) |
| Eccentricity | 0.149 |
| Orbital period | 1962.561 d (5.37 a) |
| Average orbital speed | 16.91 km/s |
| Mean anomaly | 326.964° |
| Inclination | 12.998° |
| Longitude of ascending node | 243.148° |
| Argument of perihelion | 155.023° |
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Physical characteristics
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| Dimensions | 136.04 km† 147 ± 32 km[1] |
| Mass | 2.6×1018 kg |
| Mean density | ? g/cm³ |
| Equatorial surface gravity | 0.0380 m/s² |
| Escape velocity | 0.0719 km/s |
| Rotation period | ? d |
| Albedo | 0.070 [2] |
| Temperature | ~159 K |
| Spectral type | C |
| Absolute magnitude (H) | 7.84 |
95 Arethusa (
/ˌærɨˈθjuːzə/ 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.
[edit] References
- ^ Ďurech, Josef; Kaasalainen, Mikko; Herald, David; Dunham, David; Timerson, Brad; Hanuš, Josef; Frappa, Eric; Talbot, John; Hayamizu, Tsutomu; Warner, Brian D.; Pilcher, Frederick; Galád, Adrián (2011). "Combining asteroid models derived by lightcurve inversion with asteroidal occultation silhouettes". Icarus 214 (2): 652–670. arXiv:1104.4227. Bibcode 2011Icar..214..652D. doi:10.1016/j.icarus.2011.03.016. http://astro.troja.mff.cuni.cz/projects/asteroids3D/download/durech_et_al_2011_occ_paper.pdf.
- ^ Asteroid Data Sets
[edit] External links
- Orbital simulation from JPL (Java) / Ephemeris
- Asteroid Occultation Results for North America on 2008/04/16 with 2 chords
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