Discovery [1] | |
---|---|
Discovered by | S. J. Bus |
Discovery site | Siding Spring Obs. |
Discovery date | 2 March 1981 |
Designations | |
(9524) O'Rourke | |
Named after | Laurence O'Rourke (ESAC researcher) [2] |
1981 EJ5 ·1975 NU | |
main-belt ·(inner) | |
Orbital characteristics [1] | |
Epoch 4 September 2017 (JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 41.90 yr (15,305 days) |
Aphelion | 2.6928 AU |
Perihelion | 1.7027 AU |
2.1978 AU | |
Eccentricity | 0.2253 |
3.26 yr (1,190 days) | |
335.52° | |
0° 18m 9s / day | |
Inclination | 4.9414° |
286.97° | |
9.9334° | |
Physical characteristics | |
Dimensions | 2.920±0.662 km [3] |
0.273±0.087 [3] | |
14.7 [1] | |
9524 O'Rourke, provisionally designated 1981 EJ5, is an asteroid from the inner regions of the asteroid belt, approximately 3 kilometers in diameter. It was discovered on 2 March 1981, by American astronomer Schelte Bus at the Siding Spring Observatory in New South Wales, Australia. The asteroid was named after Laurence O'Rourke, a researcher at the European Space Astronomy Centre. [2]
O'Rourke orbits the Sun in the inner main-belt at a distance of 1.7–2.7 AU once every 3 years and 3 months (1,190 days). Its orbit has an eccentricity of 0.23 and an inclination of 5° with respect to the ecliptic. [1] It was first observed as 1975 NU at Crimea–Nauchnij in 1975, extending the asteroid's observation arc by 6 years prior to its official discovery observation. [2]
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures 2.920 kilometers in diameter and its surface has an albedo of 0.273. [3]
As of 2017, O'Rourke's spectral type, as well as its rotation period and shape remain unknown. [1] [4]
This minor planet was named after Laurence O'Rourke (born 1970), a researcher at the European Space Astronomy Centre in Madrid, Spain, and a coordinator of ESA's Rosetta mission. [2] [5] The approved naming citation was published by the Minor Planet Center on 12 July 2014 ( M.P.C. 89078). [6]
9902 Kirkpatrick, provisional designation 1997 NY, is a Florian asteroid from the inner regions of the asteroid belt, approximately 4 kilometers in diameter. The asteroid was discovered on 3 July 1997, by American amateur astronomer Paul Comba at Prescott Observatory in Arizona, United States, and named after American musician Ralph Kirkpatrick.
9903 Leonhardt, provisional designation 1997 NA1, is a dark asteroid from the outer region of the asteroid belt, approximately 10 kilometers in diameter.
19738 Calinger (provisional designation 2000 AS97) is a background asteroid from the inner regions of the asteroid belt, approximately 3 kilometers in diameter.
9936 Al-Biruni, provisional designation 1986 PN4, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 24 kilometers in diameter. It was discovered on 8 August 1986, by Belgian and Bulgarian astronomers Eric Elst and Violeta Ivanova at the Rozhen Observatory, located in Bulgaria's Smolyan province near the border to Greece. It was named for Persian medieval scholar Al-Biruni.
9921 Rubincam, provisional designation 1981 EO18, is a stony asteroid from the inner regions of the asteroid belt, approximately 4 kilometers in diameter. It was discovered on 2 March 1981, by American astronomer Schelte Bus at the Siding Spring Observatory in Australia, and later named after American geophysicist David Rubincam.
3917 Franz Schubert, provisional designation 1961 CX, is a bright background asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 15 February 1961, by astronomer Freimut Börngen at the Karl Schwarzschild Observatory in Tautenburg, Germany. The asteroid was named after Austrian composer Franz Schubert.
24626 Astrowizard (provisional designation 1980 TS3) is a dark background asteroid from the central regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 9 October 1980, by American astronomer couple Carolyn and Eugene Shoemaker at the Palomar Observatory in California, United States. The asteroid was named for American science educator David Rodrigues, who would perform at public events as "The Astro Wizard".
45737 Benita is a bright asteroid located in the outer regions of the asteroid belt. It has an estimated diameter of approximately 5 kilometers. The asteroid was discovered on April 22, 2000, by Bruce Segal, an American amateur astronomer, at the Florida Atlantic University's Jupiter Observatory in Boca Raton, Florida.
2571 Geisei, provisional designation 1981 UC, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered by Japanese astronomer Tsutomu Seki at Geisei Observatory on 23 October 1981, and named for the Japanese village of Geisei.
1710 Gothard, provisional designation 1941 UF, is a stony asteroid from the inner regions of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 20 October 1941, by Hungarian astronomer György Kulin at the Konkoly Observatory in Budapest, Hungary. It was later named after Hungarian amateur astronomer Jenő Gothard.
3099 Hergenrother, provisional designation 1940 GF, is an asteroid from the outer region of the asteroid belt, approximately 15 kilometers in diameter. It was discovered on 3 April 1940, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland, and named after American astronomer Carl Hergenrother in 1996.
3169 Ostro, provisional designation 1981 LA, is a Hungaria family asteroid from the innermost regions of the asteroid belt, approximately 5 kilometers in diameter.
7776 Takeishi, provisional designation 1993 BF, is a background asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 20 January 1993, by Japanese astronomer Takeshi Urata at the Nihondaira Observatory in Japan. The assumed S-type asteroid has a rotation period of 8.9 hours. It was named after Japanese amateur astronomer Masanori Takeishi.
4760 Jia-xiang, provisional designation 1981 GN1, is a background asteroid from the inner regions of the asteroid belt, approximately 5 kilometers (3 miles) in diameter. It was discovered on 1 April 1981, by astronomers at Harvard University's Oak Ridge Observatory in Massachusetts, United States. The presumed stony S-type asteroid was named after Chinese astronomer Zhang Jiaxiang. It has a rotation period of 14.96 hours.
4432 McGraw-Hill, provisional designation 1981 ER22, is a background asteroid from the inner regions of the asteroid belt, approximately 3 kilometers (2 miles) in diameter. It was discovered on 2 March 1981, by American astronomer Schelte Bus at the Siding Spring Observatory in Australia. The likely S-type asteroid was named for the McGraw-Hill Telescope located at Kitt Peak, Arizona.
1779 Paraná, provisional designation 1950 LZ, is an asteroid from the inner regions of the asteroid belt, approximately 4 kilometers in diameter.
37432 Piszkéstető (provisional designation 2002 AE11) is an Erigonian asteroid from the inner regions of the asteroid belt, approximately 4.6 kilometers (2.9 miles) in diameter. It was discovered on 11 January 2002, by the Hungarian astronomers Krisztián Sárneczky and Zsuzsanna Heiner at the Konkoly Observatory's Piszkéstető Station northeast of Budapest, Hungary. The asteroid was later named for the discovering observatory.
6181 Bobweber, provisional designation 1986 RW, is a stony asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 6 September 1986, by American astronomer Eleanor Helin at the U.S. Palomar Observatory in California, and named after astronomer Robert Weber.
12999 Toruń, provisional designation 1981 QJ2, is a carbonaceous Baptistina asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 30 August 1981, by British–American astronomer Edward Bowell at Lowell Observatory's Anderson Mesa Station in Flagstaff, Arizona, and named after the Polish city of Toruń.
30718 Records (provisional designation 1955 RB1) is a dark background asteroid from the central region of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 14 September 1955, by Indiana University's Indiana Asteroid Program at its Goethe Link Observatory near Brooklyn, Indiana, United States. It was the program's final discovery and was named after IU's astronomy staff member Brenda Records.