80 Sappho
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| Discovery | |
|---|---|
| Discovered by | Norman Robert Pogson |
| Discovery date | May 2, 1864 |
| Designations | |
| Named after | Sappho |
| Alternative names | |
| Minor planet category | Main belt |
| Orbital characteristics[1] | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 412.343 Gm (2.756 AU) |
| Perihelion | 274.831 Gm (1.837 AU) |
| Semi-major axis | 343.587 Gm (2.297 AU) |
| Eccentricity | 0.200 |
| Orbital period | 1271.350 d (3.48 a) |
| Average orbital speed | 19.46 km/s |
| Mean anomaly | 262.909° |
| Inclination | 8.664° |
| Longitude of ascending node | 218.819° |
| Argument of perihelion | 139.111° |
| Physical characteristics | |
| Dimensions | 78.4 km |
| Mass | 5.0×1017 kg |
| Equatorial surface gravity | 0.0219 m/s² |
| Escape velocity | 0.0414 km/s |
| Rotation period | ? d |
| Albedo | 0.185 [2] |
| Temperature | ~184 K |
| Spectral type | S |
| Absolute magnitude (H) | 7.98 |
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80 Sappho (/ˈsæfoʊ/ SAF-oh) is a large main-belt asteroid. It was discovered by Norman Pogson on May 2, 1864, and is named after Sappho, the Greek poet.
13-cm radar observations of this asteroid from the Arecibo Observatory between 1980 and 1985 were used to produce a diameter estimate of 83 km.[3]
References
- ↑ Yeomans, Donald K., "80 Sappho", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), retrieved 2013-03-30.
- ↑ Asteroid Data Sets
- ↑ Ostro, S. J. et al. (August 1985), "Mainbelt asteroids - Dual-polarization radar observations", Science 229: 442–446, Bibcode:1985Sci...229..442O, doi:10.1126/science.229.4712.442.
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