1921 Pala

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°
 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. 1 2 3 "JPL Small-Body Database Browser: 1921 Pala (1973 SE)" (2014-12-31 last obs.). Jet Propulsion Laboratory. Retrieved 18 April 2016.
    2. 1 2 "Discovery Circumstances: Numbered Minor Planets (1)-(5000)". IAU: Minor Planet Center. Retrieved December 7, 2008.
    3. 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.
    4. 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.
    5. 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


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