1921 Pala
| Discovery [1][2] | |
|---|---|
| Discovered by | T. Gehrels |
| Discovery site | Palomar Obs. |
| Discovery date | 20 September 1973 |
| Designations | |
| MPC designation | 1921 Pala (1973 SE) |
Named after |
Pala (Indian reservation)[3] |
| 1973 SE | |
| main-belt (outer) | |
| Orbital characteristics [1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 42.47 yr (15513 days) |
| Aphelion | 4.5760 AU (684.56 Gm) |
| Perihelion | 1.9991 AU (299.06 Gm) |
| 3.2875 AU (491.80 Gm) | |
| Eccentricity | 0.39191 |
| 5.96 yr (2177.2 d) | |
| 66.367° | |
| 0° 9m 55.26s / day | |
| Inclination | 19.242° |
| 352.31° | |
| 19.749° | |
| Earth MOID | 1.00516 AU (150.370 Gm) |
| Jupiter MOID | 0.991696 AU (148.3556 Gm) |
| Jupiter Tisserand parameter | 2.964 |
| Physical characteristics | |
|
14.6 mag[1] 14.3 [4] | |
|
| |
1921 Pala (1973 SE) is an outer main-belt asteroid discovered on September 20, 1973 by Tom Gehrels at Palomar Observatory.[2] It is one of very few asteroids located in the 2 : 1 mean motion resonance with Jupiter.[5]
It is named after the Indian reservation, Pala, located at the base of Palomar Mountain, believed to apply to an Indian tribe whose members have lived in the area for many centuries.[3]
See also
References
- 1 2 3 "JPL Small-Body Database Browser: 1921 Pala (1973 SE)" (2014-12-31 last obs.). Jet Propulsion Laboratory. Retrieved 18 April 2016.
- 1 2 "Discovery Circumstances: Numbered Minor Planets (1)-(5000)". IAU: Minor Planet Center. Retrieved December 7, 2008.
- 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1921) Pala. Springer Berlin Heidelberg. p. 154. ISBN 978-3-540-29925-7. Retrieved October 2015.
- ↑ Tholen (2007). "Asteroid Absolute Magnitudes". EAR-A-5-DDR-ASTERMAG-V11.0. Planetary Data System. Archived from the original on 1 December 2008. Retrieved January 1, 2009.
- ↑ Roig; Nesvorny, D.; Ferraz-Mello, S.; et al. (2002). "Asteroids in the 2 : 1 resonance with Jupiter: dynamics and size distribution". Monthly Notices of the Royal Astronomical Society 335 (2): 417–431. Bibcode:2002MNRAS.335..417R. doi:10.1046/j.1365-8711.2002.05635.x.
External links
- "1921 Pala (1973 SE)". JPL Small-Body Database. Jet Propulsion Laboratory. SPK-ID: 2001921.
- 1921 Pala at the JPL Small-Body Database
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