124 Alkeste
| Discovery | |
|---|---|
| Discovered by | Christian Heinrich Friedrich Peters |
| Discovery date | 23 August 1872 |
| Designations | |
Named after | Alcestis |
| Main belt | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 143.65 yr (52468 d) |
| Aphelion | 2.8288 AU (423.18 Gm) |
| Perihelion | 2.43166 AU (363.771 Gm) |
| 2.63022 AU (393.475 Gm) | |
| Eccentricity | 0.075491 |
| 4.27 yr (1558.1 d) | |
Average orbital speed | 18.34 km/s |
| 343.779° | |
| 0° 13m 51.816s / day | |
| Inclination | 2.9573° |
| 187.991° | |
| 61.413° | |
| Earth MOID | 1.41927 AU (212.320 Gm) |
| Jupiter MOID | 2.17851 AU (325.900 Gm) |
| Jupiter Tisserand parameter | 3.394 |
| Physical characteristics | |
| Dimensions | 76.36±1.7 km |
| Mass | 4.7×1017 kg |
Equatorial surface gravity | 0.0214 m/s² |
Equatorial escape velocity | 0.0404 km/s |
| 9.921 h (0.4134 d) | |
| 0.1728±0.008 | |
| Temperature | ~172 K |
| S | |
| 8.11,[1] 8.09[2] | |
|
| |
124 Alkeste is a large main-belt asteroid. It is an S-type in composition. C.H.F. Peters discovered the asteroid on August 23, 1872, from the observatory at Hamilton College, New York State. The name was chosen by Adelinde Weiss, wife of the astronomer Edmund Weiss, and refers to Alcestis, a woman in Greek mythology.[3]
Only one stellar occultation by Alkeste has been observed, when the asteroid passed in front of the third magnitude star Beta Virginis on June 24, 2003. The event was observed from Australia and New Zealand.
References
- 1 2 Yeomans, Donald K., "124 Alkeste", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
- ↑ Warner, Brian D. (December 2007), "Initial Results of a Dedicated H-G Project", The Minor Planet Bulletin, 34, pp. 113–119, Bibcode:2007MPBu...34..113W.
- ↑ Lutz D. Schmadel, Dictionary of Minor Planet Names, p.27.
External links
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