279 Thule
Thule, minor planet designation: 279 Thule, is a large asteroid from the outer asteroid belt. It is classified as a D-type asteroid and is probably composed of organic-rich silicates, carbon and anhydrous silicates. Thule was the first asteroid discovered with a semi-major axis greater than 4 AU. It was discovered by Johann Palisa on 25 October 1888 in Vienna and was named after the ultimate northern land of Thule.
Orbital diagram | |
| Discovery | |
|---|---|
| Discovered by | Johann Palisa |
| Discovery date | 25 October 1888 |
| Designations | |
MPC designation | (279) Thule |
| Pronunciation | /ˈθjuːliː/ |
Alternative designations | A888 UA, 1920 GA 1923 RA, 1927 EC 1954 FF |
Minor planet category | Asteroid belt (Thule) |
| Adjectives | Thulean /ˈθjuːliən/ |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 125.34 yr (45780 d) |
| Aphelion | 4.4617880 AU (667.47398 Gm) |
| Perihelion | 4.2367660 AU (633.81117 Gm) |
Semi-major axis | 4.3492770 AU (650.64258 Gm) |
| Eccentricity | 0.025869 |
Orbital period (sidereal) | 9.07 yr (3313.0 d) |
Mean anomaly | 62.75874° |
Mean motion | 0° 6m 31.184s / day |
| Inclination | 2.323774° |
Longitude of ascending node | 72.46791° |
| 42.36797° | |
| Physical characteristics | |
| Dimensions | 126.59±3.7 km (IRAS) |
Synodic rotation period | 23.896 h (0.9957 d) |
| 0.0412±0.003 | |
| Temperature | 133 K |
| B−V=0.75 U−B=0.32 D (Tholen) X (SMASSII) | |
| 8.57 | |
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