1804 Chebotarev

1804 Chebotarev (prov. designation: 1967 GG) is a stony background asteroid from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 6 April 1967, by Russian astronomer Tamara Smirnova at the Crimean Astrophysical Observatory in Nauchnyj on the Crimean peninsula.[7] The asteroid was named after Soviet astronomer G. A. Chebotarev.[2]

1804 Chebotarev
Shape model of Chebotarev from its lightcurve
Discovery [1]
Discovered byT. Smirnova
Discovery siteCrimean Astrophysical Obs.
Discovery date6 April 1967
Designations
(1804) Chebotarev
Named after
G. A. Chebotarev (astronomer)[2]
1967 GG · 1938 QL
1942 RL · 1968 QK
main-belt · (inner) [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc78.05 yr (28,506 days)
Aphelion2.4628 AU
Perihelion2.3584 AU
2.4106 AU
Eccentricity0.0217
3.74 yr (1,367 days)
96.780°
0° 15m 47.88s / day
Inclination3.6316°
325.72°
305.47°
Physical characteristics
Dimensions9.15±1.12 km[4]
10.79 km (calculated)[3]
4.026±0.002 h[5]
0.20 (assumed)[3]
0.501±0.289[4]
S [3]
11.56[4] · 12.2[1][3] · 12.25±0.45[6]

    Orbit and classification

    The stony S-type asteroid orbits the Sun in the inner main-belt at a distance of 2.4–2.5 AU once every 3 years and 9 months (1,367 days). Its orbit has an eccentricity of 0.02 and an inclination of 4° with respect to the ecliptic.[1] Chebotarev was first identified as 1938 QL at Yerkes Observatory in 1938, extending the body's observation arc by 29 years prior to its official discovery observation.[7]

    Physical characteristics

    Rotation period

    In February 2004, a rotational lightcurve of Chebotarev was obtained from photometric observations by French amateur astronomer Laurent Bernasconi. It gave a well-defined rotation period of 4.026 hours with a brightness amplitude of 0.41 magnitude (U=3).[5]

    Diameter and albedo

    According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Chebotarev measures 9.15 kilometers in diameter, and its surface has a high albedo of 0.501,[4] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 10.79 kilometers with an absolute magnitude of 12.2.[3]

    Naming

    This minor planet was named in honor of G. A. Chebotarev (1913–1975), who was a professor and the director of the Institute of Theoretical Astronomy as well as president of IAU's Commission 20, (Positions & Motions of Minor Planets, Comets & Satellites). He is known for his work on celestial mechanics of asteroids, comets and satellites.[2] The official naming citation was published by the Minor Planet Center on 1 January 1974 (M.P.C. 3569).[8]

    References
    1. "JPL Small-Body Database Browser: 1804 Chebotarev (1967 GG)" (2016-09-14 last obs.). Jet Propulsion Laboratory. Retrieved 8 June 2017.
    2. Schmadel, Lutz D. (2007). "(1804) Chebotarev". Dictionary of Minor Planet Names – (1804) Chebotarev. Springer Berlin Heidelberg. pp. 144–145. doi:10.1007/978-3-540-29925-7_1805. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (1804) Chebotarev". Asteroid Lightcurve Database (LCDB). Retrieved 16 December 2016.
    4. 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 16 December 2016.
    5. Behrend, Raoul. "Asteroids and comets rotation curves – (1804) Chebotarev". Geneva Observatory. Retrieved 16 December 2016.
    6. Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 16 December 2016.
    7. "1804 Chebotarev (1967 GG)". Minor Planet Center. Retrieved 16 December 2016.
    8. Schmadel, Lutz D. (2009). "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. doi:10.1007/978-3-642-01965-4. ISBN 978-3-642-01964-7.

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