2000 Herschel

2000 Herschel
Discovery [1]
Discovered by J. Schubart
Discovery site Sonneberg Obs.
Discovery date 29 July 1960
Designations
MPC designation 2000 Herschel
Named after
 William Herschel[2]
1960 OA · 1934 NX
main-belt
Orbital characteristics [1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 81.52 yr (29774 days)
Aphelion 3.0878 AU (461.93 Gm)
Perihelion 1.6737 AU (250.38 Gm)
2.3807 AU (356.15 Gm)
Eccentricity 0.29697
3.67 yr (1341.7 d)
18.87 km/s
331.96°
0° 16m 5.916s / day
Inclination 22.795°
292.06°
130.19°
Earth MOID 0.755311 AU (112.9929 Gm)
Jupiter MOID 2.37453 AU (355.225 Gm)
Jupiter Tisserand parameter 3.377
Physical characteristics
Dimensions 17 km[3][4]
130 h (5.4 d)
0.2[3][4]
Temperature ~ 180 K
B–V = 0.893
U–B = 0.494
Tholen = S
11.25

    2000 Herschel, provisional designation 1960 OA, is a stony asteroid from the asteroid belt, about 17 kilometers in diameter. It was discovered by astronomer Joachim Schubart at Sonneberg Observatory, Germany on 29 July 1960.[5] The eccentric orbit of the slowly rotating S-type asteroid with an albedo of 0.2 is inclined by 23 degrees to the ecliptic.

    Analysis of the light curve for this object appears to show that it is tumbling, with rotation occurring about the non-principal axis. The rotation period is estimated as 130±3 hours, during which time the magnitude of the object varies by 1.16±0.05 in magnitude.[6] The relatively high orbital eccentricity of this object causes it to come close to the orbit of the planet Mars. This means there is a chance it will eventually collide with the planet, with the odds of a collision estimated at 18% per billion orbits.[7]

    It is named in honour of the English astronomer of German origin William Herschel who discovered Uranus. While the minor planet with number "1000", 1000 Piazzia, honours the discoverer of the first minor planet, Giuseppe Piazzi, number "2000" does so for Herschel, discoverer of the first telescopic major planet.[2]

    References

    1. 1 2 "JPL Small-Body Database Browser: 2000 Herschel (1960 OA)" (2015-09-14 last obs.). Jet Propulsion Laboratory. Retrieved 17 April 2016.
    2. 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (2000) Herschel. Springer Berlin Heidelberg. p. 162. ISBN 978-3-540-29925-7. Retrieved 23 August 2016.
    3. 1 2 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 23 August 2016.
    4. 1 2 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 23 August 2016.
    5. ↑ "2000 Herschel (2008)", The Minor Planet Observer and Palmer Divide Observatory, retrieved 2012-08-21
    6. ↑ Warner, Brian D. (April 2011). "Upon Further Review: VI. An Examination of Previous Lightcurve Analysis from the Palmer Divide Observatory". The Minor Planet Bulletin. 38 (2): 96–101. Bibcode:2011MPBu...38...96W. ISSN 1052-8091. Retrieved 23 August 2016.
    7. ↑ Steel, D. I. (August 1985), "Collisions in the solar systems. II - Asteroid impacts upon Mars", Monthly Notices of the Royal Astronomical Society, 215: 369–381, Bibcode:1985MNRAS.215..369S, doi:10.1093/mnras/215.3.369.

    External links

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