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Discovery
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|---|---|
| Discovered by | Robert Luther |
| Discovery date | February 20, 1890 |
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Designations
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| Named after | Glauce |
| Alternate name(s) | 1955 MO; 1959 GB; 1961 WF |
| Minor planet category |
Main belt |
| Epoch October 22, 2004 (JD 2453300.5) | |
| Aphelion | 499.173 Gm (3.337 AU) |
| Perihelion | 325.456 Gm (2.176 AU) |
| Semi-major axis | 412.314 Gm (2.756 AU) |
| Eccentricity | 0.211 |
| Orbital period | 1671.295 d (4.58 a) |
| Average orbital speed | 17.74 km/s |
| Mean anomaly | 332.837° |
| Inclination | 4.330° |
| Longitude of ascending node | 120.591° |
| Argument of perihelion | 83.174° |
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Physical characteristics
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| Dimensions | 32.2 km |
| Mass | 3.5×1016 kg |
| Mean density | 2.0 ? g/cm³ |
| Equatorial surface gravity | 0.0090 m/s² |
| Escape velocity | 0.0170 km/s |
| Rotation period | 50 d 1 |
| Albedo | 0.1973 2 |
| Temperature | ~115 K |
| Spectral type | SK |
| Absolute magnitude (H) | 9.84 |
288 Glauke ( /ˈɡlɔːkiː/ glaw-kee) is an asteroid from the asteroid belt discovered by Robert Luther in 1890. It was the last of his asteroid discoveries. It is named after Glauke, a daughter of Creon a king of Corinth in Greek mythology.
Glauke has an exceptionally slow rotation period of about 1200 hours (50 days).[1] This makes it the slowest-rotating non-planetary object known in the Solar System (both Mercury and Venus rotate more slowly). The rotation is believed to be "tumbling", similar to 4179 Toutatis.
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