78431 Kemble

78431 Kemble
Discovery [1]
Discovered by A. Lowe
Discovery site Palomar Obs.
Discovery date 16 August 2002
Designations
MPC designation (78431) Kemble
Named after
 Lucian Kemble
(Franciscan friar and
amateur astronomer)[2]
2002 QJ50 · 1999 YC2
2001 EY26
main-belt · (inner)
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 24.55 yr (8,968 days)
Aphelion 2.8110 AU
Perihelion 2.0744 AU
2.4427 AU
Eccentricity 0.1508
3.82 yr (1,394 days)
70.425°
0° 15m 29.52s / day
Inclination 2.9958°
226.80°
356.28°
Physical characteristics
Dimensions 2±1 km (calculated)[3]
16.7[1]

    78431 Kemble, provisional designation 2002 QJ50, is an asteroid from the inner regions of the asteroid belt, approximately 3 kilometers in diameter. It was discovered on 16 August 2002, by astronomer Andrew Lowe on images taken at the Palomar Observatory, California, United States.[4] The asteroid was named after Father Lucian Kemble.

    Orbit and classification

    Kemble orbits the Sun in the inner main-belt at a distance of 2.1–2.8 AU once every 3 years and 10 months (1,394 days). Its orbit has an eccentricity of 0.15 and an inclination of 3° with respect to the ecliptic.[1] 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.[4]

    Physical characteristics

    A generic diameter of 1 to 3 kilometers can be derived for Kemble based on its absolute magnitude of 16.7 and an assumed albedo in the range of 0.05 to 0.25.[3] Since asteroids in the inner main-belt are often of a silicaceous rather than of a carbonaceous composition, with higher albedos, typically around 0.20, the asteroid's diameter might be on the lower end of NASA's published conversion table, as the higher the body's reflectivity (albedo), the smaller its diameter, for a given absolute magnitude (brightness).[3]

    As of 2017, Kemble's effective size, its composition and albedo, as well as its rotation period and shape remain unknown.[1][5]

    Naming

    This minor planet was named in honour 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.[2][6][7] The approved naming citation was published by the Minor Planet Center on 18 September 2005 (M.P.C. 54828).[8]

    References

    1. 1 2 3 4 5 "JPL Small-Body Database Browser: 78431 Kemble (2002 QJ50)" (2016-05-02 last obs.). Jet Propulsion Laboratory. Retrieved 28 June 2017.
    2. 1 2 Schmadel, Lutz D. (2006). Dictionary of Minor Planet Names – (78431) Kemble, Addendum to Fifth Edition: 2003–2005. Springer Berlin Heidelberg. p. 231. ISBN 978-3-540-34360-8. Retrieved 27 April 2016.
    3. 1 2 3 "Asteroid Size Estimator". CNEOS – NASA/JPL. Retrieved 16 October 2017.
    4. 1 2 "78431 Kemble (2002 QJ50)". Minor Planet Center. Retrieved 27 February 2016.
    5. ↑ "LCDB Data for (78431) Kemble". Asteroid Lightcurve Database (LCDB). Retrieved 28 June 2017.
    6. ↑ "Credits and Special Mentions – Father Lucian Kemble 1922–1999". The Royal Astronomical Society of Canada – Calgary Centre. Retrieved 27 February 2016.
    7. ↑ 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.
    8. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 27 April 2016.
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