288 Glauke
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|
| Discovery A (http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html) | |
|---|---|
| Discoverer | Robert Luther |
| Discovery date | February 20, 1890 |
| Alternate designations | 1955 MO; 1959 GB; 1961 WF B (http://cfa-www.harvard.edu/iau/MPDes.html) |
| Category | Main belt |
| Orbital elements C (http://asteroid.lowell.edu/) Epoch October 22, 2004 (JD 2453300.5) | |
| Eccentricity (e) | 0.211 |
| Semi-major axis (a) | 412.314 Gm (2.756 AU) |
| Perihelion (q) | 325.456 Gm (2.176 AU) |
| Aphelion (Q) | 499.173 Gm (3.337 AU) |
| Orbital period (P) | 1671.295 d (4.58 a) |
| Mean orbital speed | 17.74 km/s |
| Inclination (i) | 4.330° |
| Longitude of the ascending node (Ω) | 120.591° |
| Argument of perihelion (ω) | 83.174° |
| Mean anomaly (M) | 332.837° |
| Physical characteristics | |
| Dimensions | 32.2 km |
| Mass | 3.5×1016 kg |
| Density | 2.0 ? g/cm³ |
| Surface gravity | 0.0090 m/s² |
| Escape velocity | 0.0170 km/s |
| Rotation period | 50 d 1 (http://www.astrosurf.com/aude-old/map_files/AstVarMAP01-2003.htm) |
| Spectral class | SK |
| Absolute magnitude | 9.84 |
| Albedo | 0.1973 2 (http://www.psi.edu/pds/archive/astdata/ALBEDOS/albedos.tab) |
| Mean surface temperature | ~115 K |
288 Glauke is an asteroid discovered by Robert Luther in 1890. It was the last of his asteroid discoveries. It is named after Glauke, a daughter of Creon in Greek mythology.
Glauke has an exceptionally slow rotation period of about 1200 hours (50 days). 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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