386 Siegena
Main-belt asteroid
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386 Siegena is a very large main-belt asteroid. It is classified as a C-type asteroid and is probably composed of primitive carbonaceous material.
Lightcurve-base 3D-model of Siegena on the top with an image of the asteroid on the bottom. | |
| Discovery | |
|---|---|
| Discovered by | Max Wolf |
| Discovery date | 1 March 1894 |
| Designations | |
| (386) Siegena | |
| Pronunciation | /ËsiËÉ¡ÉnÉ/ SEE-gÉ-nÉ[1] |
Named after | Siegen |
| 1894 AY | |
| Main belt | |
| Adjectives | Siegenian /siËËÉ¡ÉniÉn/ see-GHEN-ee-Én[2] |
| Orbital characteristics[3] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 122.08 yr (44590 d) |
| Aphelion | 3.38983 AU (507.111 Gm) |
| Perihelion | 2.40159 AU (359.273 Gm) |
| 2.89571 AU (433.192 Gm) | |
| Eccentricity | 0.17064 |
| 4.93 yr (1799.8 d) | |
| 66.7510° | |
| 0° 12m 0.068s / day | |
| Inclination | 20.2568° |
| 166.886° | |
| 219.478° | |
| Physical characteristics | |
| Dimensions | 165.01±2.7 km[3] 170.35 ± 8.40 km[4] |
| Mass | (8.14 ± 1.58) à 1018 kg[4] |
Mean density | 3.14 ± 0.76 g/cm3[4] |
| 9.763 h (0.4068 d) | |
| 0.0692±0.002 | |
| C | |
| 7.43 | |
It was discovered by Max Wolf on March 1, 1894, in Heidelberg.
During 1999, the asteroid was observed occulting a star. The resulting chords provided a diameter estimate of 174 km.[5]
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