78431 Kemble

78431 Kemble, provisional designation 2002 QJ50, is a background asteroid from the inner regions of the asteroid belt, approximately 1.4 kilometers (0.9 miles) in diameter. It was named after Father Lucian Kemble. The asteroid was discovered on 16 August 2002, by astronomer Andrew Lowe on images taken at the Palomar Observatory, California, United States.[1]

78431 Kemble
Discovery [1][2]
Discovered byA. Lowe
Discovery sitePalomar Obs.
Discovery date16 August 2002
Designations
(78431) Kemble
Named after
Lucian Kemble
(Franciscan friar and
amateur astronomer)[3]
2002 QJ50 · 1999 YC2
2001 EY26
main-belt · (inner)
background [4][5]
Orbital characteristics [2]
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 0
Observation arc27.02 yr (9,869 d)
Aphelion2.8113 AU
Perihelion2.0755 AU
2.4434 AU
Eccentricity0.1506
3.82 yr (1,395 d)
225.13°
0° 15m 28.8s / day
Inclination2.9959°
226.79°
356.42°
Physical characteristics
Mean diameter
1.4 km (est. at 0.20)[6]
16.6[1][2]

    Naming

    This minor planet was named in honor of Father Lucian Kemble (1922–1999), who was a Franciscan friar and astronomer. His recorded main interest in astronomy was searching out deep sky objects and he was also known for his interest in asterisms such as Kemble's Cascade.[3][7][8] The official naming citation was published by the Minor Planet Center on 18 September 2005 (M.P.C. 54828).[9]

    Orbit and classification

    Kemble is a non-family asteroid of the main belt's background population.[4][5] It orbits the Sun in the inner asteroid belt at a distance of 2.1–2.8 AU once every 3 years and 10 months (1,395 days; semi-major axis of 2.44 AU). Its orbit has an eccentricity of 0.15 and an inclination of 3° with respect to the ecliptic.[2] A precovery obtained at the Steward Observatory (Kitt Peak) in 1991, extends the body's observation arc by 11 years prior to its official discovery observation.[1]

    Physical characteristics

    A generic diameter of 1 to 3 kilometers can be derived for Kemble based on its absolute magnitude of 16.6 and with an assumed albedo of 0.20,[6] which is typical for the abundant silicaceous asteroids in the inner main-belt. As of 2019, Kemble's effective size, its composition and albedo, as well as its rotation period and shape remain unknown.[2][10]

    References
    1. "78431 Kemble (2002 QJ50)". Minor Planet Center. Retrieved 6 June 2019.
    2. "JPL Small-Body Database Browser: 78431 Kemble (2002 QJ50)" (2018-10-20 last obs.). Jet Propulsion Laboratory. Retrieved 6 June 2019.
    3. Schmadel, Lutz D. (2006). "(78431) Kemble [2.44, 0.15, 3.0]". Dictionary of Minor Planet Names – (78431) Kemble, Addendum to Fifth Edition: 2003–2005. Springer Berlin Heidelberg. p. 231. doi:10.1007/978-3-540-34361-5_2754. ISBN 978-3-540-34360-8.
    4. "Asteroid 78431 Kemble". Small Bodies Data Ferret. Retrieved 6 June 2019.
    5. "Asteroid (78431) Kemble". AstDyS-2, Asteroids – Dynamic Site. Retrieved 6 June 2019.
    6. "Asteroid Size Estimator". CNEOS – NASA/JPL. Retrieved 16 October 2017.
    7. "Credits and Special Mentions – Father Lucian Kemble 1922–1999". The Royal Astronomical Society of Canada – Calgary Centre. Retrieved 27 February 2016.
    8. Peter Bergbusch (June 1999). "Obituary - Father Lucian Kemble 1922–1999". Journal of the Royal Astronomical Society of Canada. 93: 151. Bibcode:1999JRASC..93..151. Retrieved 27 February 2016.
    9. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 6 June 2019.
    10. "LCDB Data for (78431) Kemble". Asteroid Lightcurve Database (LCDB). Retrieved 6 June 2019.

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