2752 Wu Chien-Shiung
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2752 Wu Chien-Shiung, provisional designation Template:Mp, is an Eoan asteroid from the outer regions of the asteroid belt, approximately Script error: No such module "convert". in diameter. It was discovered on 20 September 1965, by astronomers at Purple Mountain Observatory in Nanking, China.[1] The asteroid has a long rotation period of 36.3 hours.[2] It was named for Chinese-American nuclear physicist Chien-Shiung Wu.[1]
Orbit and classification
Wu Chien-Shiung is a core member of the Eos family (606Script error: No such module "Check for unknown parameters".),[2][3] one of the largest asteroid families named after 221 Eos.[4] It orbits the Sun in the outer main-belt at a distance of 2.7–3.4 AU once every 5 years and 3 months (1,920 days; semi-major axis of 3.02 AU). Its orbit has an eccentricity of 0.11 and an inclination of 10° with respect to the ecliptic.[5]
The asteroid was first observed as Template:Mp at Heidelberg Observatory in August 1933. The body's observation arc begins as Template:Mp at the Goethe Link Observatory in November 1960, or 5 years prior to its official discovery observation at Nanking.[1]
Physical characteristics
Wu Chien-Shiung is an assumed S-type asteroid, while the overall spectral type for members of the Eos family is that of a K-type.[2][4]Template:Rp
Rotation period
In August 2012, a rotational lightcurve of Wu Chien-Shiung was obtained from photometric observations in the S-band by astronomers with the Palomar Transient Factory in California. Lightcurve analysis gave a long rotation period of 36.343 hours with a brightness amplitude of 0.28 magnitude (U=2Script error: No such module "Check for unknown parameters".).[6] While not being a slow rotator with spin rates above 100 hours, Wu Chien-Shiung's period is significantly longer than the average 2 to 20 hours observed for most asteroids.
Diameter and albedo
According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Wu Chien-Shiung measures 15.484 and 16.65 kilometers in diameter and its surface has an albedo of 0.203 and 0.184,[7][8][9] respectively, while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for K-type asteroids of 0.14 – derived from the Eos family's parent body – and calculates a diameter of 17.80 kilometers based on an absolute magnitude of 11.5.[2]
Naming
This minor planet was named after Chinese-American nuclear physicist Chien-Shiung Wu (1912–1997), renowned for her research on the separation of uranium isotopes by gaseous diffusion and for the Wu experiment conducted in 1956, for which she was awarded a Wolf Prize in Physics in 1978 (also see list of laureates).[1]
The official naming citation was published by the Minor Planet Center on 11 March 1990 (M.P.C. 16040Script error: No such module "Check for unknown parameters".).[10]
References
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- ↑ Script error: No such module "Citation/CS1". (online, AcuA catalog p. 153)
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External links
- Asteroid Lightcurve Database (LCDB), query form (info Script error: No such module "webarchive".)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- Template:AstDys
- Template:PAGENAMEBASE at the JPL Small-Body DatabaseTemplate:EditAtWikidata
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