209 Dido
| Discovery | |
|---|---|
| Discovered by | C. H. F. Peters |
| Discovery date | 22 October 1879 |
| Designations | |
Named after | Dido |
|
A909 AB, A909 GB, A912 RB | |
| Main belt | |
| Adjectives | Didonian |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 136.47 yr (49845 d) |
| Aphelion | 3.33106 AU (498.319 Gm) |
| Perihelion | 2.96843 AU (444.071 Gm) |
| 3.14974 AU (471.194 Gm) | |
| Eccentricity | 0.057565 |
| 5.59 yr (2041.8 d) | |
Average orbital speed | 16.79 km/s |
| 311.722° | |
| 0° 10m 34.738s / day | |
| Inclination | 7.17313° |
| 0.682681° | |
| 248.387° | |
| Earth MOID | 1.96485 AU (293.937 Gm) |
| Jupiter MOID | 1.71077 AU (255.928 Gm) |
| Jupiter Tisserand parameter | 3.193 |
| Physical characteristics | |
| Dimensions |
159.94±3.1 km[1] 140.35 ± 10.12 km[2] |
| Mass | (4.59 ± 7.42) × 1018 kg[2] |
| 5.7366 h (0.23903 d)[1][3] | |
| 0.0349±0.001 | |
| C | |
| 8.24 | |
|
| |
209 Dido is a very large main-belt asteroid. It is classified as a C-type asteroid and is probably composed of carbonaceous materials. Like many asteroids of its type, it has an extremely low albedo.
It was discovered by C. H. F. Peters on October 22, 1879 in Clinton, New York and was named after the mythical Carthaginian queen Dido.
Photometric observations at the Palmer Divide Observatory during 2005 showed a rotation period of 5.7366 ± 0.0005 hours with a brightness variation of 0.17 ± 0.02 in magnitude.[3]
References
- 1 2 3 "209 Dido". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.
- 1 2 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, arXiv:1203.4336
, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1. - 1 2 Warner, Brian D. (December 2005), "Asteroid lightcurve analysis at the Palmer Divide Observatory - spring 2005", The Minor Planet Bulletin, 32 (4): 90–92, Bibcode:2005MPBu...32...90W.
External links
- The Asteroid Orbital Elements Database
- Minor Planet Discovery Circumstances
- Asteroid Lightcurve Data File
- 209 Dido at the JPL Small-Body Database
This article is issued from Wikipedia - version of the 9/9/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.