3192 A'Hearn

3192 A'Hearn
Discovery[1]
Discovered by E. Bowell
Discovery site Anderson Mesa Stn.
Discovery date 30 January 1982
Designations
MPC designation 3192 A'Hearn
Named after
Michael A'Hearn
(astronomer)[2]
1982 BY1 · 1975 JN
main-belt · (inner)[3]
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 40.18 yr (14,676 days)
Aphelion 2.7782 AU
Perihelion 1.9757 AU
2.377 AU
Eccentricity 0.1688
3.66 yr (1,339 days)
143.7607°
 16m 8.04s / day
Inclination 2.879°
56.7293°
91.5616°
Physical characteristics
Dimensions 5.66 km (calculated)[3]
3.160 h[4]
0.20 (assumed)[3]
SMASS = C[1]
C[3]
13.6[1][3]

    3192 A'Hearn, provisional designation 1982 BY1, is a carbonaceous asteroid from the inner regions of the asteroid belt, about 6 kilometers in diameter. It was discovered by American astronomer Edward Bowell at Lowell's Anderson Mesa Station in Flagstaff, Arizona, on 30 January 1982.[5]

    The C-type asteroid orbits the Sun at a distance of 2.0–2.8 AU once every 3 years and 8 months (1,338 days). Its orbit shows an eccentricity of 0.17 and is tilted by 3 degrees to the plane of the ecliptic.[1] The first precovery was obtained at El Leoncito in 1975, extending the asteroid's observation arc by 7 years prior to its discovery.[5]

    A rotational light-curve for this asteroid was obtained from photometric observations made by Japanese astronomer Sunao Hasegawa, using the 1.05-meter Schmidt telescope at Kiso Observatory in March 2004. It showed a well-defined rotation period of 3.16 hours with a brightness amplitude of 0.20 in magnitude (U=3).[4] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.20 – an unusually high value for a carbonaceous body, otherwise known for their low albedos, typically around 0.06 – and calculates a diameter of 5.7 kilometers.[3]

    The minor planet was named for American cometary astronomer and professor of astronomy at CMNS, Michael A'Hearn (b.1940), known for his contribution to cometary science, especially for his wide-range spectroscopic and spectrophotometric observations. He participated in the space-based EPOXI and IUE mission, which, in 1983, detected for the first time the presence of cometary diatomic sulfur while observing Comet IRAS–Araki–Alcock's spectrum.[2][6] Naming citation was published on 22 June 1986 (M.P.C. 10848).[7]

    References

    1. 1 2 3 4 5 "JPL Small-Body Database Browser: 3192 A'Hearn (1982 BY1)" (2015-07-12 last obs.). Jet Propulsion Laboratory. Retrieved May 2016.
    2. 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (3192) A’Hearn. Springer Berlin Heidelberg. p. 265. ISBN 978-3-540-00238-3. Retrieved May 2016.
    3. 1 2 3 4 5 6 "LCDB Data for (3192) A'Hearn". Asteroid Lightcurve Database (LCDB). Retrieved May 2016.
    4. 1 2 Hasegawa, S.; Miyasaka, S.; Mito, H.; Sarugaku, Y.; Ozawa, T.; Kuroda, D.; et al. (May 2012). "Lightcurve Survey of V-Type Asteroids. Observations Until 2005". Asteroids. arXiv:1204.0548. Bibcode:2012arXiv1204.0548H. Retrieved May 2016.
    5. 1 2 "3192 A'Hearn (1982 BY1)". Minor Planet Center. Retrieved May 2016.
    6. Boice, Daniel C.; Reyle, Celine (December 2002). "The Nature of Diatomic Sulfur in Comets". Formation of Cometary Material. Bibcode:2003IAUJD..14E..38B. Retrieved May 2016.
    7. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved May 2016.

    External links


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