211 Isolda
| Discovery | |
|---|---|
| Discovered by | Johann Palisa |
| Discovery date | 10 December 1879 |
| Designations | |
|
Named after
|
Iseult |
| A912 AB, A912 BA, 1950 FM |
|
| Main belt | |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 136.19 yr (49742 d) |
| Aphelion | 3.53270 AU (528.484 Gm) |
| Perihelion | 2.5514 AU (381.68 Gm) |
| 3.04205 AU (455.084 Gm) | |
| Eccentricity | 0.16129 |
| 5.31 yr (1938.0 d) | |
|
Average orbital speed
|
17.08 km/s |
| 260.142° | |
| 0° 11m 8.74s / day | |
| Inclination | 3.8856° |
| 263.644° | |
| 173.522° | |
| Earth MOID | 1.56519 AU (234.149 Gm) |
| Jupiter MOID | 1.73306 AU (259.262 Gm) |
| Jupiter Tisserand parameter | 3.216 |
| Physical characteristics | |
| Dimensions |
143.19±5.1 km 149.81 ± 6.10 km |
| Mass | (4.49 ± 2.43) × 1018 kg |
|
Mean density
|
2.54 ± 1.41 g/cm3 |
| 18.365 h (0.7652 d) | |
|
0.0602±0.004 0.0598 ± 0.0218 |
|
| C (Tholen) | |
| 7.89, 7.90 | |
211 Isolda is a very large, dark main-belt asteroid. It is classified as a C-type asteroid and is probably composed of primitive carbonaceous material.
It was discovered by Austrian astronomer Johann Palisa on December 10, 1879, in Pola, and named after Isolde, heroine of the legend of Tristan and Iseult.
In 2001, the asteroid was detected by radar from the Arecibo Observatory at a distance of 1.78 AU. The resulting data yielded an effective diameter of 143 ± 16 km.
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