1206 Numerowia

1206 Numerowia
Discovery [1]
Discovered by K. Reinmuth
Discovery site Heidelberg Obs.
Discovery date 18 October 1931
Designations
MPC designation 1206 Numerowia
Named after
 Boris Numerov
(astronomer)[2]
1931 UH · 1974 QE
1974 TY1
main-belt · (outer) [3]
Orbital characteristics [1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 84.48 yr (30855 days)
Aphelion 3.0221 AU (452.10 Gm)
Perihelion 2.7122 AU (405.74 Gm)
2.8672 AU (428.93 Gm)
Eccentricity 0.054037
4.85 yr (1773.3 d)
317.04°
0° 12m 10.836s / day
Inclination 13.005°
324.47°
277.21°
Earth MOID 1.73706 AU (259.860 Gm)
Jupiter MOID 2.11292 AU (316.088 Gm)
Jupiter Tisserand parameter 3.259
Physical characteristics
Dimensions 15.63±1.09 km[4]
14.173±0.092 km[5]
27.90 km (calculated)[3]
4.7743 h (0.19893 d)[1][6]
0.141±0.021[4]
0.1680±0.0205[5]
0.057 (assumed)[3]
C [3]
11.5

    1206 Numerowia, provisional designation 1931 UH, is an assumed carbonaceous asteroid from the outer region of the asteroid belt, about 15 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany on 18 October 1931.[7]

    The asteroid orbits the Sun at a distance of 2.7–3.0 AU once every 4 years and 10 months (1,772 days). Its orbit shows an eccentricity of 0.06 and is tilted by 13 degrees to the plane of the ecliptic. It has a rotation period of 4.8 hours[6] and an albedo of 0.14–0.17, based on observations by the Japanese Akari and the Wide-field Infrared Survey Explorer (WISE) satellites.[4][5] The Collaborative Asteroid Lightcurve Link (CALL) assumes the body to be a carbonaceous C-type asteroid, rather than a silicaceous one, with a much lower geometric albedo of 0.06. As a consequence, the body's diameter would be twice as large, or about 28 kilometers, compared to the results by the space-based Akari and WISE missions.[3]

    The minor planet was named after Russian astronomer and geophysicist Boris Numerov (1891–1941), founder and director of the Institute for Theoretical Astronomy in Leningrad, who was executed for espionage by the Soviet Union in 1941. The accusation was based on the fact that a German had named the asteroid after him.[2] In 1957, his memory was rehabilitated.[8] The lunar crater Numerov was also named in his honour.

    References

    1. 1 2 3 "JPL Small-Body Database Browser: 1206 Numerowia (1931 UH)" (2015-03-15 last obs.). Jet Propulsion Laboratory. Retrieved 30 April 2016.
    2. 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1206) Numerowia. Springer Berlin Heidelberg. p. 101. ISBN 978-3-540-29925-7. Retrieved November 2015.
    3. 1 2 3 4 5 "LCDB Data for (1206) Numerowia". Asteroid Lightcurve Database (LCDB). Retrieved November 2015.
    4. 1 2 3 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 November 2015.
    5. 1 2 3 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:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved November 2015.
    6. 1 2 Molnar, Lawrence A.; Haegert, Melissa, J.; Beaumont, Christopher N.; Block, Marjorie J.; Brom, Timothy H.; Butler, Andrew R.; et al. (March 2008). "Lightcurve Analysis of a Magnitude Limited Asteroid Sample". The Minor Planet Bulletin 35 (1): 9–12. Bibcode:2008MPBu...35....9M. ISSN 1052-8091. Retrieved November 2015.
    7. ↑ "1206 Numerowia (1931 UH)". Minor Planet Center. Retrieved November 2015.
    8. ↑ "Columbia University Computing History–A Chronology of Computing at Columbia University". Columbia University. 31 July 2015. Retrieved November 2015.

    External links


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