119 Althaea
|
A three-dimensional model of 119 Althaea based on its light curve. | |
| Discovery | |
|---|---|
| Discovered by | James Craig Watson |
| Discovery date | April 3, 1872 |
| Designations | |
Named after | Althaea |
| Main belt | |
| Orbital characteristics[1] | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 417.511 Gm (2.791 AU) |
| Perihelion | 354.870 Gm (2.372 AU) |
| 386.190 Gm (2.582 AU) | |
| Eccentricity | 0.081 |
| 1515.000 d (4.15 a) | |
Average orbital speed | 18.51 km/s |
| 1.847° | |
| Inclination | 5.778° |
| 203.738° | |
| 171.282° | |
| Physical characteristics | |
| Dimensions | 57.3 km |
| Mass | 2.0×1017 kg |
| 0.0160 m/s² | |
| 0.0303 km/s | |
| 11.484[2] h | |
| Temperature | ~173 K |
Spectral type | S |
| 8.42 | |
|
| |
.png)
119 Althaea is a main-belt asteroid that was discovered by Canadian-American astronomer J. C. Watson on April 3, 1872,[2] and named after Althaea, the mother of Meleager in Greek mythology. Two occultations by Althaea were observed in 2002, only a month apart.
Based upon its spectrum, this is classified as an S-type asteroid.[3] Photometric observations made in 1988 at the Félix Aguilar Observatory produced a light curve with a period of 11.484 ± 0.010 hours with a brightness variation of 0.365 ± 0.010 in magnitude.[2]
References
- ↑ Yeomans, Donald K., "119 Althaea", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), retrieved 2013-03-25.
- ↑ 2.0 2.1 2.2 Hutton, R. G. (June 1990), "V+B Photoelectric Photometry of Asteroid 119 Althaea", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers 17: 15–17, Bibcode:1990MPBu...17...15H.
- ↑ DeMeo, Francesca E. et al. (July 2009), "An extension of the Bus asteroid taxonomy into the near-infrared" (PDF), Icarus 202 (1): 160–180, Bibcode:2009Icar..202..160D, doi:10.1016/j.icarus.2009.02.005, retrieved 2013-04-08. See appendix A.
| ||||||
| ||||||||||||||||||||||||||||