10502 Armaghobs

10502 Armaghobs
Discovery [1]
Discovered by E. F. Helin
Discovery site Palomar Obs.
Discovery date 22 August 1987
Designations
MPC designation 10502 Armaghobs
Named after
 Armagh Observatory [2]
1987 QF6 · 1980 PJ2
1994 RJ29
Mars-crosser [3]
Orbital characteristics [1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 35.42 yr (12,938 days)
Aphelion 3.0435 AU
Perihelion 1.5760 AU
2.3098 AU
Eccentricity 0.3177
3.51 yr (1,282 days)
89.721°
0° 16m 50.88s / day
Inclination 21.934°
170.25°
263.26°
Earth MOID 0.7437 AU
Physical characteristics
Dimensions 2.97 km (calculated)[3]
24.978±0.002 h[4]
0.20 (assumed)[3]
S [3] · Q [5]
15.0[1][3] · 15.44±0.08[5]

    10502 Armaghobs, provisional designation 1987 QF6, is an eccentric, rare-type stony asteroid and Mars-crosser from the inner regions of the asteroid belt, about 3 kilometers in diameter. It was discovered by American female astronomer Eleanor Helin at the U.S. Palomar Observatory in California, on 22 August 1987.[6]

    The S-type asteroid was also classified as a relatively rare Q-type body by Pan-STARRS' large-scale survey.[5] It orbits the Sun at a distance of 1.6–3.0 AU once every 3 years and 6 months (1,282 days). Its orbit has an eccentricity of 0.32 and an inclination of 22° with respect to the ecliptic.[1] The first precovery was taken at ESO's La Silla Observatory in 1980, extending the asteroid's observation arc by 7 years prior to its discovery.[6]

    In 2013, a rotational light-curve obtained from photometric observations at the Riverland Dingo Observatory at Moorook, South Australia, gave a rotation period of 24.978±0.002 hours with a brightness amplitude of 0.51 in magnitude (U=2).[4] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20, and calculates a diameter of 3.0 kilometers based on an absolute magnitude of 15.0.[3]

    The minor planet was named after the Armagh Observatory in Northern Ireland. The present-day astronomical research institute was founded by Archbishop Richard Robinson in 1790. The Estonian astronomer Ernst Öpik, after whom 2099 Öpik is named, had been a long-time member of the Observatory. It is also known for the invention of the cup-anemometer by Thomas Robinson, the New General Catalogue compiled by John Dreyer, and Lindsay's Armagh-Dunsink-Harvard telescope.[2] Naming citation was published on 9 January 2001 (M.P.C. 41937).[7]

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 10502 Armaghobs (1987 QF6)" (2016-01-12 last obs.). Jet Propulsion Laboratory. Retrieved 4 December 2016.
    2. 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (10502) Armaghobs. Springer Berlin Heidelberg. p. 736. ISBN 978-3-540-00238-3. Retrieved 28 April 2016.
    3. 1 2 3 4 5 6 "LCDB Data for (10502) Armaghobs". Asteroid Lightcurve Database (LCDB). Retrieved 28 April 2016.
    4. 1 2 Hills, Kevin (January 2014). "Asteroid Lightcurve Analysis at Riverland Dingo Observatory (RDO): 2013 Results". The Minor Planet Bulletin. 41 (1): 2–3. Bibcode:2014MPBu...41....2H. ISSN 1052-8091. Retrieved 28 April 2016.
    5. 1 2 3 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:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 28 April 2016.
    6. 1 2 "10502 Armaghobs (1987 QF6)". Minor Planet Center. Retrieved 28 April 2016.
    7. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 28 April 2016.

    External links

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