1831 Nicholson

1831 Nicholson
Discovery [1]
Discovered by P. Wild
Discovery site Zimmerwald Obs.
Discovery date 17 April 1968
Designations
MPC designation (1831) Nicholson
Named after
 Seth B. Nicholson
(American astronomer)[2]
1968 HC · 1948 GF
1955 ML
main-belt
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 61.74 yr (22,552 days)
Aphelion 2.5254 AU
Perihelion 1.9527 AU
2.2391 AU
Eccentricity 0.1279
3.35 yr (1,224 days)
220.11°
0° 17m 39.12s / day
Inclination 5.6334°
72.607°
183.67°
Physical characteristics
Dimensions 8.083±0.468[3]
3.228 h (0.1345 d)
0.296±0.053[3]
SMASS = S [1]
12.5[1]

    1831 Nicholson, provisional designation 1968 HC, is a stony asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter.

    The asteroid was discovered on 17 April 1968, by Swiss astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland. The S-type asteroid orbits the Sun in the inner main-belt at a distance of 2.0–2.5 AU once every 3 years and 4 months (1,224 days). Its orbit has an eccentricity of 0.13 and an inclination of 6° with respect to the ecliptic.[1]

    This minor planet was named after American astronomer Seth B. Nicholson (1891–1963), who pioneered in several branches of planetary research at Mount Wilson Observatory and discovered the four Jupiter moons, Sinope, Lysithea, Carme, and Ananke.[2] The lunar and Martian crater Nicholson have also been named after him.

    References

    1. 1 2 3 4 5 "JPL Small-Body Database Browser: 1831 Nicholson (1968 HC)" (2017-03-21 last obs.). Jet Propulsion Laboratory. Retrieved 14 June 2017.
    2. 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1831) Nicholson. Springer Berlin Heidelberg. p. 147. ISBN 978-3-540-29925-7. Retrieved 22 August 2016.
    3. 1 2 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 14 June 2017.


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