288 Glauke
Glauke (minor planet designation: 288 Glauke) is a stony, tumbling asteroid and slow rotator from the intermediate asteroid belt, approximately 32 kilometers in diameter. It was discovered on 20 February 1890, by Robert Luther at Düsseldorf-Bilk Observatory in Germany. It was the last of his asteroid discoveries. It is named after Creusa (known as Glauce or Glauke), a daughter of Creon, a king of Corinth in Greek mythology.
Orbital diagram | |
| Discovery | |
|---|---|
| Discovered by | Robert Luther |
| Discovery site | Düsseldorf-Bilk Obs. |
| Discovery date | 20 February 1890 |
| Designations | |
MPC designation | (288) Glauke |
| Pronunciation | /ˈɡlɔːkiː/ |
Named after | Creusa (a.k.a. Glauce or Glauke) |
Alternative designations | A890 DA, 1955 MO 1959 GB, 1961 WF |
Minor planet category | Main belt |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 124.34 yr (45416 d) |
| Aphelion | 3.32685 AU (497.690 Gm) |
| Perihelion | 2.19625 AU (328.554 Gm) |
Semi-major axis | 2.76155 AU (413.122 Gm) |
| Eccentricity | 0.20470 |
Orbital period (sidereal) | 4.59 yr (1676.2 d) |
Mean anomaly | 176.219° |
Mean motion | 0° 12m 53.172s / day |
| Inclination | 4.33517° |
Longitude of ascending node | 120.135° |
| 84.8286° | |
| Physical characteristics | |
| Dimensions | 32.21±2.2 km (IRAS) |
Synodic rotation period | 1,170 h (49 d) |
| 0.1973±0.029< | |
| S | |
| 9.84 | |
Glauke has an exceptionally slow rotation period of about 1200 hours (50 days). This makes it one of the slowest-rotating asteroids in the Solar System. The rotation is believed to be "tumbling", similar to the near-Earth asteroid 4179 Toutatis.
It is a common, stony S-type asteroid in both the Tholen and SMASS classification.