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    2285 Ron Helin

    From Wikipedia - Reading time: 5 min

    2285 Ron Helin
    Discovery [1]
    Discovered byS. J. Bus
    Discovery sitePalomar Obs.
    Discovery date27 August 1976
    Designations
    MPC designation
    		(2285) Ron Helin
    Named after
    		Ronald P. Helin
    husband of astronomer
    Eleanor F. Helin[2]
    Alternative designations
    		1976 QB
    Minor planet category
    		main-belt · Flora [3]
    Orbital characteristics [1]
    Epoch 4 September 2017 (JD 2458000.5)
    Uncertainty parameter 0
    Observation arc40.54 yr (14,807 days)
    Aphelion2.6815 AU
    Perihelion1.7578 AU
    Semi-major axis
    		2.2197 AU
    Eccentricity0.2081
    Orbital period (sidereal)
    		3.31 yr (1,208 days)
    Mean anomaly
    		139.05°
    Mean motion
    		0° 17m 52.8s / day
    Inclination5.3339°
    Longitude of ascending node
    		157.85°
    Argument of perihelion
    		182.81°
    Physical characteristics
    Dimensions4.11 km (calculated)[3]
    Synodic rotation period
    		12 h[4]
    Geometric albedo
    		0.24 (assumed)[3]
    Spectral type
    		S [3]
    Absolute magnitude (H)
    		14.0[1] · 14.1[3]

    2285 Ron Helin, provisional designation 1976 QB, is a stony Florian asteroid from the inner region of the asteroid belt, approximately 4 kilometers in diameter. It was discovered on 27 August 1976, by American astronomer Schelte Bus at Palomar Observatory in San Diego County, California.[5]

    Orbit and characterization[edit]

    Ron Helin is a member of the Flora family, one of the largest groups of stony asteroids in the main-belt. It orbits the Sun in the inner main-belt at a distance of 1.8–2.7 AU once every 3 years and 4 months (1,208 days). Its orbit has an eccentricity of 0.21 and an inclination of 5° with respect to the ecliptic. Its rotation period is 12 hours.[1]

    Naming[edit]

    This minor planet was named in honor of Ronald Helin, husband of American astronomer Eleanor Helin (1932–2009), in appreciation of his support of the Palomar Planet-Crossing Asteroid Survey (PCAS).[2] The approved naming citation was published by the Minor Planet Center on 11 December 1981 (M.P.C. 6531).[6]

    References[edit]

    1. ^ a b c d "JPL Small-Body Database Browser: 2285 Ron Helin (1976 QB)" (2017-03-11 last obs.). Jet Propulsion Laboratory. Retrieved 19 June 2017.
    2. ^ a b Schmadel, Lutz D. (2007). "(2285) Ron Helin". Dictionary of Minor Planet Names – (2285) Ron Helin. Springer Berlin Heidelberg. p. 186. doi:10.1007/978-3-540-29925-7_2286. ISBN 978-3-540-00238-3.
    3. ^ a b c d e "LCDB Data for (2285) Ron Helin". Asteroid Lightcurve Database (LCDB). Retrieved 19 June 2017.
    4. ^ Behrend, Raoul. "Asteroids and comets rotation curves – (2285) Ron Helin". Geneva Observatory. Retrieved 19 June 2017.
    5. ^ "2285 Ron Helin (1976 QB)". Minor Planet Center. Retrieved 19 June 2017.
    6. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 19 June 2017.

    External links[edit]

    This article is licensed under CC BY-SA 3.0.
    Original source: https://en.wikipedia.org/wiki/2285 Ron Helin
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