|
Jimarnold
2143 Jimarnold, provisional designation , 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. The asteroid was named after American cosmochemist, James R. Arnold. Orbit and classification ''Jimarnold'' is a non-Asteroid family, family asteroid from the main belt's Background asteroid, background population. It orbits the Sun in the Kirkwood gap, inner asteroid belt at a distance of 1.7–2.8 Astronomical unit, AU once every 3 years and 5 months (1,258 days; semi-major axis of 2.28 AU). Its orbit has an orbital eccentricity, eccentricity of 0.23 and an orbital inclination, inclination of 8Degree (angle), ° with respect to the ecliptic. The body's observation arc begins with a precovery taken at Palomar in April 1954, almost two decades prior to its official discovery observation. Physic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eleanor Helin
Eleanor Francis "Glo" Helin (née Francis, 19 November 1932 – 25 January 2009) was an American astronomer. She was principal investigator of the Near-Earth Asteroid Tracking (NEAT) program of NASA's Jet Propulsion Laboratory. (Some sources give her name as Eleanor Kay Helin.) Helin was a prolific discoverer of minor planets ''(see list)'' and several comets, including periodic comets 111P/Helin–Roman–Crockett, 117P/Helin–Roman–Alu and 132P/Helin–Roman–Alu. She is credited as the discoverer of the object now known as both asteroid 4015 Wilson–Harrington and comet 107P/Wilson–Harrington. Although Wilson and Harrington preceded her by some decades, their observations did not establish an orbit for the object, while her rediscovery did. Helin discovered or co-discovered 903 asteroids and several comets. Biography Helin was born an only child to Fred and Kay Francis. At the age of five, she became ill with polio, which caused her to be bed-ridden for several ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |