1921 Pala

1921 Pala
Discovery[1]
Discovered byT. Gehrels
Discovery sitePalomar Obs.
Discovery date20 September 1973
Designations
(1921) Pala
Named after
Pala (Indian reservation)[2]
1973 SE
main-belt · (outer)[1]
background[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc43.52 yr (15,895 days)
Aphelion4.5807 AU
Perihelion2.0148 AU
3.2978 AU
Eccentricity0.3890
5.99 yr (2,187 days)
165.04°
0° 9m 52.56s / day
Inclination19.192°
352.31°
20.092°
Physical characteristics
Dimensions8.2 km[4]: 422 
14.3[5] · 14.6[1]

1921 Pala, provisional designation 1973 SE is a background asteroid in an unstable orbit located in the outer region of asteroid belt, approximately 8.2 kilometers in diameter. It is one of very few bodies located in the 2 : 1 mean motion resonance with Jupiter.[4] It was discovered by Dutch–American astronomer Tom Gehrels at Palomar Observatory on 20 September 1973.[6]

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  4. ^ a b Cite error: The named reference Roig-2002 was invoked but never defined (see the help page).
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  6. ^ Cite error: The named reference MPC-object was invoked but never defined (see the help page).