7387 Malbil

7387 Malbil
Discovery [1]
Discovered by E. Bowell
Discovery site Anderson Mesa Stn.
Discovery date 30 January 1982
Designations
MPC designation (7387) Malbil
Named after
 Malcolm Bilson
(pianist)[2]
1982 BS1
main-belt · (inner)
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 35.44 yr (12,946 days)
Aphelion 2.8283 AU
Perihelion 2.0728 AU
2.4506 AU
Eccentricity 0.1542
3.84 yr (1,401 days)
139.08°
0° 15m 24.84s / day
Inclination 7.0546°
151.07°
295.00°
Physical characteristics
Dimensions 6.3 km (est. at 0.20)[3]
13.4[1]

    7387 Malbil, provisional designation 1982 BS1, is a background asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 30 January 1982, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station in Arizona, United States.[4] It is named for pianist Malcolm Bilson.[2]

    Classification and orbit

    Malbil is not a member of any known asteroid family. It orbits the Sun in the inner main-belt at a distance of 2.1–2.8 AU once every 3 years and 10 months (1,401 days). Its orbit has an eccentricity of 0.15 and an inclination of 7° with respect to the ecliptic.[1] The body's observation arc begins with its first used observation at the discovering observatory in 1986, or 4 years after its official discovery observation.[4]

    Physical characteristics

    As of 2017, Malbil's effective size, its composition and albedo, as well as its rotation period and shape remain unknown.[1][5] Based on a magnitude-to-diameter conversion, its generic diameter is between 5 and 12 kilometer for an absolute magnitude of 13.4, and an assumed albedo in the range of 0.05 to 0.25.[3] Since asteroids in the inner main-belt are typically of stony rather than carbonaceous composition, with albedos of 0.20 or higher, Malbil's diameter can be estimate to measure around 6.3 kilometers, as the higher its albedo (reflectivity), the lower the body's diameter at a constant absolute magnitude (brightness).[3]

    Naming

    This minor planet was named after American fortepianist and musicologist Malcolm Bilson (born 1935), who gave a recital at the "Asteroids, Comets, Meteors" conference at Cornell University in New York.[2] The approved naming citation was published by the Minor Planet Center on 28 July 1999 (M.P.C. 35485).[6]

    References

    1. 1 2 3 4 5 "JPL Small-Body Database Browser: 7387 Malbil (1982 BS1)" (2017-07-05 last obs.). Jet Propulsion Laboratory. Retrieved 5 September 2017.
    2. 1 2 3 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (7387) Malbil. Springer Berlin Heidelberg. p. 594. ISBN 978-3-540-00238-3. Retrieved 12 March 2017.
    3. 1 2 3 "Asteroid Size Estimator". CNEOS/JPL. Retrieved 5 September 2017.
    4. 1 2 "7387 Malbil (1982 BS1)". Minor Planet Center. Retrieved 12 March 2017.
    5. ↑ "LCDB Data for (7387) Malbil". Asteroid Lightcurve Database (LCDB). Retrieved 12 March 2017.
    6. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 12 March 2017.

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