Discovery [1] | |
---|---|
Discovered by | H. E. Holt |
Discovery site | Palomar Obs. |
Discovery date | 27 July 1990 |
Designations | |
(5642) Bobbywilliams | |
Named after | Bobby G. Williams (JPL engineer) [2] |
1990 OK1 | |
Mars-crosser [1] [3] [4] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 (JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 41.97 yr (15,330 days) |
Aphelion | 3.0867 AU |
Perihelion | 1.5454 AU |
2.3161 AU | |
Eccentricity | 0.3327 |
3.52 yr (1,287 days) | |
235.13° | |
0° 16m 46.56s / day | |
Inclination | 24.956° |
310.12° | |
39.038° | |
Physical characteristics | |
Dimensions | 4.71 km (calculated) [4] |
4.8341±0.0003 h [5] | |
0.20 (assumed) [4] | |
S [4] | |
14.0 [1] [4] ·14.24±0.23 [6] | |
5642 Bobbywilliams, provisional designation 1990 OK1, is an eccentric, stony asteroid and Mars-crosser from the inner regions of the asteroid belt, approximately 4.7 kilometers in diameter.
It was discovered on 27 July 1990, by American astronomer Henry E. Holt at Palomar Observatory in California, United States. [3] The asteroid was named for JPL engineer Bobby Williams. [2]
Bobbywilliams orbits the Sun in the inner main-belt at a distance of 1.5–3.1 AU once every 3 years and 6 months (1,287 days). Its orbit has an eccentricity of 0.33 and an inclination of 25° with respect to the ecliptic. [1] A first precovery was taken at the Australian Siding Spring Observatory in 1975, extending the body's observation arc by 15 years prior to its official discovery at Palomar. [3]
In July 2011, a rotational lightcurve of Bobbywilliams was obtained from photometric observations by astronomer Julian Oey at both the Australian Kingsgrove ( E19 ) and Leura ( E17 ) observatories. Lightcurve analysis gave a well-defined rotation period of 4.8341 hours with a brightness variation of 0.05 magnitude ( U=3 ). [5]
The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 4.71 kilometers with an absolute magnitude of 14.0. [4]
This minor planet was named for Jet Propulsion Laboratory engineer Bobby G. Williams (born 1951), specialized in celestial mechanics and the navigation of space probes. He has been a leading navigation manager when NEAR Shoemaker had its rendezvous with the asteroids 253 Mathilde and 433 Eros, [2] The official naming citation was published by the Minor Planet Center on 28 July 1999 ( M.P.C. 35483). [7]
3850 Peltier, provisional designation 1986 TK2, is a Florian asteroid and suspected interloper from the inner regions of the asteroid belt, approximately 4 kilometers in diameter. It was discovered on 7 October 1986, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station, near Flagstaff, Arizona. The asteroid was named after American amateur astronomer Leslie Peltier.
1729 Beryl, provisional designation 1963 SL, is a stony background asteroid from the Florian region in the inner asteroid belt, approximately 9 kilometers in diameter. It was discovered on 19 September 1963, by astronomers at Indiana University during the Indiana Asteroid Program at Goethe Link Observatory in Indiana, United States. The S-type asteroid has a rotation period of 4.9 hours. It was named for Beryl H. Potter, a long-time research assistant of the discovering program.
1099 Figneria, provisional designation 1928 RQ, is an asteroid from the background population of the outer regions of the asteroid belt, approximately 26 kilometers in diameter. Discovered by Grigory Neujmin at Simeiz Observatory in 1928, the asteroid was later named after Russian revolutionary activist Vera Figner.
3771 Alexejtolstoj (provisional designation 1974 SB3) is a stony Flora asteroid from the inner regions of the asteroid belt, approximately 3.7 kilometers in diameter. It was discovered on 20 September 1974, by Russian–Ukrainian astronomer Lyudmila Zhuravleva at the Crimean Astrophysical Observatory in Nauchnyj on the Crimean peninsula. The asteroid was named after writer Aleksey Nikolayevich Tolstoy.
3034 Climenhaga is a stony Florian asteroid and synchronous binary asteroid from the inner regions of the asteroid belt, approximately 7.8 kilometers in diameter. The asteroid was discovered on 24 September 1917 by German astronomer Max Wolf at Heidelberg Observatory in southwest Germany and assigned provisional designation A917 SE. It was later named after Canadian astrophysicist John Climenhaga. Its minor-planet moon has a period of nearly 19 hours.
9564 Jeffwynn, provisional designation 1987 SG3, is an eccentric asteroid and Mars-crosser from the inner regions of the asteroid belt, approximately 4.7 kilometers in diameter.
2874 Jim Young, provisional designation 1982 TH, is a stony Florian asteroid and slow rotator from the inner regions of the asteroid belt, approximately 7.5 kilometers in diameter. It was discovered on 13 October 1982, by American astronomer Edward Bowell at Lowell Observatory's Anderson Mesa Station near Flagstaff, Arizona. The asteroid was named after American astronomer James Young.
5481 Kiuchi, provisional designation 1990 CH, is a bright binary Vestian asteroid from the inner regions of the asteroid belt, approximately 4 kilometers in diameter. It was discovered on 15 February 1990, by Japanese astronomers Kin Endate and Kazuro Watanabe at Kitami Observatory in Hokkaidō, Japan, and named after their colleague Tsuruhiko Kiuchi. The V-type asteroid has a rotation period of 3.6 hours.
4904 Makio, provisional designation 1989 WZ, is a stony asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered by Japanese astronomers Yoshikane Mizuno and Toshimasa Furuta at Kani Observatory on 21 November 1989. It was named after Japanese astronomer Makio Akiyama.
1607 Mavis, provisional designation 1950 RA, is a stony asteroid from the central region of the asteroid belt, approximately 12 kilometers in diameter. It was discovered on 3 September 1950, by South African astronomer Ernest Johnson at Johannesburg Observatory in South Africa. It was later named after the wife of astronomer Jacobus Bruwer.
4332 Milton, provisional designation 1983 RC, is a background asteroid from the central regions of the asteroid belt, approximately 11 kilometers in diameter. It was discovered on 5 September 1983, by American astronomer Carolyn Shoemaker at the Palomar Observatory in California. The X e-subtype has a rotation period of 3.3 hours. It was named after Daniel Milton, American geologist with the USGS.
5040 Rabinowitz, provisional designation 1972 RF, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered by Dutch–American astronomer Tom Gehrels at Palomar Observatory on 15 September 1972. Contrary to most of his discoveries, this asteroid is unrelated to the Palomar–Leiden survey and exclusively credited to Tom Gehrels.
1979 Sakharov, provisionally designated 2006 P-L, is a stony Vestian asteroid from the inner regions of the asteroid belt, approximately 4.5 kilometers in diameter. It was discovered during the Palomar–Leiden survey in 1960, and named after Russian physicist Andrei Sakharov.
2055 Dvořák, provisional designation 1974 DB, is an eccentric asteroid and sizable Mars-crosser from the innermost regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 19 February 1974, by Czech astronomer Luboš Kohoutek at the Bergedorf Observatory in Hamburg, Germany. It was named after Czech composer Antonín Dvořák.
1563 Noël, provisional designation 1943 EG, is a stony Flora asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 7 March 1943, by Belgian astronomer Sylvain Arend at the Royal Observatory of Belgium in Uccle, and named after his son.
1449 Virtanen, provisional designation 1938 DO, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 9.2 kilometers in diameter. It was discovered on 20 February 1938, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland, and named for Finnish biochemist Artturi Virtanen.
10208 Germanicus, provisional designation 1997 QN1, is a stony Florian asteroid and binary system from the inner regions of the asteroid belt, approximately 3.5 kilometers in diameter.
15268 Wendelinefroger, provisional designation 1990 WF3, is a stony, spheroidal, and binary Nysian asteroid from the inner regions of the asteroid belt, approximately 3.4 kilometers in diameter.
21501 Acevedo (provisional designation 1998 KC8) is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 2.4 kilometers in diameter.
(15700) 1987 QD is a Mars-crossing asteroid and a binary candidate from inside the innermost region of the asteroid belt, approximately 3 kilometers in diameter. It was discovered on 24 August 1987, by American astronomer Stephen Singer-Brewster at the Palomar Observatory in California. The likely spherical X-type asteroid has a rotation period of 3.1 hours. The suspected presence of a kilometer-sized minor-planet moon was announced in November 2000.