سیارک ۲۱۴۳
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سیارک ۲۱۴۳ (به انگلیسی: 2143 Jimarnold، نامگذاری:1973SA) دو هزار و صد و چهل و سومین سیارک کشف شدهاست[۱] که در ۲۶ سپتامبر ۱۹۷۳ کشف شد.[۲] قدر مطلق سیارک برابر ۱۴٫۳۰ است.[۳] منابع[ویرایش]
پیوند به بیرون[ویرایش]
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2143 Jimarnold, provisional designation 1973 SA, is a background asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 26 September 1973, by astronomer Eleanor Helin at the Palomar Observatory in California, United States.[5] The asteroid was named after American cosmochemist, James R. Arnold.[2] ContentsOrbit and classificationJimarnold is a non-family asteroid from the main belt's background population.[3] It orbits the Sun in the inner asteroid belt at a distance of 1.7–2.8 AU once every 3 years and 5 months (1,258 days; semi-major axis of 2.28 AU). Its orbit has an eccentricity of 0.23 and an inclination of 8° with respect to the ecliptic.[1] The body's observation arc begins with a precovery taken at Palomar in April 1954, almost two decades prior to its official discovery observation.[5] Physical characteristicsDiameter and albedoAccording to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Jimarnold measures 4.934 kilometers in diameter and its surface has an albedo of 0.138.[4] Rotation periodAs of 2017, no rotational lightcurve of Jimarnold has been obtained from photometric observations. The body's rotation period, poles and shape remain unknown.[1][6] NamingThis minor planet was named after James R. Arnold (1923–2012), professor of chemistry and director of California Space Science Institute at the University of California, San Diego. Arnold's cosmochemical research included the study of cosmic radiation, the origin of meteorites, for which he developed a computer model, the lunar soil and mapping of the Moon's composition.[2] The official naming citation was proposed by the discoverer and Eugene Shoemaker, and published by the Minor Planet Center before November 1977 (M.P.C. 4788).[7] References
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