| Discovery [1] | |
|---|---|
| Discovered by | E. Bowell |
| Discovery site | Anderson Mesa Stn. |
| Discovery date | 22 January 1983 |
| Designations | |
| (7225) Huntress | |
Named after | Wesley Huntress (astrochemist) [2] |
| 1983 BH ·1989 XJ | |
| main-belt · Flora [3] | |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 55.84 yr (20,394 days) |
| Aphelion | 2.8166 AU |
| Perihelion | 1.8654 AU |
| 2.3410 AU | |
| Eccentricity | 0.2032 |
| 3.58 yr (1,308 days) | |
| 242.35° | |
| 0° 16m 30.72s / day | |
| Inclination | 6.8695° |
| 275.73° | |
| 203.51° | |
| Known satellites | 1 (synchronous, ⌀: 21%) [lower-alpha 1] [4] |
| Physical characteristics | |
| Dimensions | 5.94±1.26 km [5] 6.58±0.33 km [6] 6.680±0.224 km [7] [8] 6.748 km [9] 6.75 km (taken) [3] |
| 2.43995±0.00003 h [lower-alpha 2] 2.4400±0.0001 h [4] 2.44±0.01 h [lower-alpha 3] | |
| 0.1558 [9] 0.165±0.016 [7] [8] 0.257±0.034 [6] 0.27±0.13 [5] | |
| SMASS = S [1] · S [3] | |
| 13.00 [6] ·13.00±0.03(R) [lower-alpha 2] ·13.1 [1] ·13.33±0.40 [10] ·13.45 [7] ·13.47 [5] ·13.49±0.058 [3] [9] | |
7225 Huntress, provisional designation 1983 BH, is a binary [lower-alpha 1] Florian asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 22 January 1983, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station in Flagstaff, Arizona, United States. [11] It is named after astrochemist Wesley Huntress. [2]
Huntress is a member of the Flora family, one of the largest families of stony asteroids. [1] [3] It orbits the Sun in the inner main-belt at a distance of 1.9–2.8 AU once every 3 years and 7 months (1,308 days). Its orbit has an eccentricity of 0.20 and an inclination of 7° with respect to the ecliptic. [1] The first precovery was taken at Palomar in 1960, extending the body's observation arc by 23 years prior to its official discovery observation at Flagstaff. [11]
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Huntress measures between 5.94 and 6.680 kilometers in diameter and its surface has an albedo between 0.165 and 0.27. [5] [6] [7] [8] The Collaborative Asteroid Lightcurve Link adopts Pravec's revised WISE-data and takes an albedo of 0.1558, a diameter of 6.75 kilometers and an absolute magnitude of 13.49. [3] [9]
In December 2007, two rotational lightcurves of Huntress were independently obtained by astronomers Petr Pravec and Donald Pray. Lightcurve analysis gave a rotation period of 2.43995 and 2.4400 hours, respectively. The body's low brightness amplitude of 0.11 magnitude suggest a nearly spheroidal shape ( U=3/n.a. ). [lower-alpha 2] [4] During the photometric observations, it was revealed, that Huntress is a synchronous binary asteroid with an asteroid moon orbiting it every 14.67 hours. The moon's diameter was estimated to be 21% of that of Huntress (or 1.3 kilometers assuming a primary diameter of 6 km). [lower-alpha 1] [4]
In March 2012, Australian astronomer David Higgins obtained a concurring lightcurve with period of 2.44 hours and an amplitude of 0.11 magnitude ( U=2 ). [lower-alpha 3] For an asteroid of its size, Huntress has a relatively short spin rate, not much above the 2.2-hour threshold for fast rotators.
This minor planet was named in honor of American astrochemist and space scientist Wesley Huntress (born 1942), who has been NASA's director of space science programs in the 1990s, and has pioneered research relevant to the chemical evolution of interstellar clouds, comets and planetary atmospheres. [2] Naming citation was proposed by the discoverer and published on 8 August 1998 ( M.P.C. 32348). [12]
1763 Williams, provisional designation 1953 TN2, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 13 October 1953, by astronomers of the Indiana Asteroid Program at Goethe Link Observatory in Indiana, United States. The asteroid was named after Kenneth P. Williams, professor of mathematics at Indiana University.
6398 Timhunter, provisional designation 1991 CD1, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 5.5 kilometers in diameter. It was discovered on 10 February 1991, by American astronomer couple Carolyn and Eugene Shoemaker, in collaboration with Canadian astronomer David H. Levy at Palomar Observatory in California, United States. It was named for American amateur astronomer Tim Hunter.
6084 Bascom, provisional designation 1985 CT, is a binary Phocaea asteroid from the inner regions of the asteroid belt, approximately 6.3 kilometers in diameter. It was discovered on 12 February 1985, by American astronomer couple Carolyn and Eugene Shoemaker at Palomar Observatory in California. It is named after American geologist Florence Bascom. Its satellite measures approximately 2.3 kilometers and has an orbital period of 43.51 hours.
2033 Basilea, provisional designation 1973 CA, is a stony asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 6 February 1973, by astronomer Paul Wild at the Zimmerwald Observatory near Bern, Switzerland. The asteroid was named for the Swiss city of Basel.
29292 Conniewalker (provisional designation 1993 KZ1) is a bright, stony Phocaea asteroid and slow tumbler from the inner regions of the asteroid belt, approximately 4.6 kilometers in diameter. It was discovered on 24 May 1993, by American astronomer Carolyn Shoemaker and Canadian astronomer David Levy at the Palomar Observatory in California, United States.
1991 Darwin, provisional designation 1967 JL, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter.
1722 Goffin, provisional designation 1938 EG, is a stony asteroid from the central region of the asteroid belt, approximately 10.3 kilometers in diameter.
8116 Jeanperrin, provisional designation 1996 HA15, is a Florian asteroid and synchronous binary system from the inner regions of the asteroid belt, approximately 4.8 kilometers (3 miles) in diameter. It was discovered on 17 April 1996, by Belgian astronomer Eric Elst at the La Silla Observatory in northern Chile. The likely stony S-type asteroid has a rotation period of 3.62 hours and a nearly round shape. It was named for French physicist and Nobel laureate Jean Baptiste Perrin. A minor-planet moon, a third the size of its primary, was discovered in 2007.
5905 Johnson, provisional designation 1989 CJ1, is a Hungaria asteroid and synchronous binary system from the innermost regions of the asteroid belt, approximately 4 kilometers (2.5 miles) in diameter. It was discovered on 11 February 1989, by American astronomer Eleanor Helin at Palomar Observatory in California, United States. Its satellite measures approximately 1.6 km (1 mi) in diameter and orbits its primary every 21.8 hours. It was named after American astronomer and engineer Lindley N. Johnson.
19763 Klimesh is a stony Phocaea asteroid and slow rotator from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. Discovered by NEAT at Haleakala Observatory in 2000, the asteroid was named for NEAT's software specialist Matthew Klimesh.
1739 Meyermann, provisional designation 1939 PF, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 7.5 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory on 15 August 1939. It was later named in memory of astronomer Bruno Meyermann.
15350 Naganuma, provisional designation 1994 VB2, is a stony background asteroid from the inner regions of the asteroid belt, approximately 4.3 kilometers (2.7 miles) in diameter. It was discovered on 3 November 1994, by Japanese astronomers Yoshio Kushida and Osamu Muramatsu at the Yatsugatake South Base Observatory. The likely S-type asteroid has a rotation period of 2.5 hours. It was named for the town of Naganuma in northern Japan.
2648 Owa, provisional designation 1980 VJ, is a background asteroid from the Flora region of the inner asteroid belt, approximately 6 kilometers in diameter. It was discovered on 8 November 1980, by American astronomer Edward Bowell at the Anderson Mesa Station near Flagstaff, Arizona, in the United States. The presumably S-type asteroid has a rotation period of 3.56 hours. It was named for the word "rock" in the Native American Hopi language.
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.
1405 Sibelius, provisional designation 1936 RE, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 12 September 1936, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland. The asteroid was named after composer Jean Sibelius.
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.
2195 Tengström, provisional designation 1941 SP1, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 27 September 1941, by Finnish astronomer Liisi Oterma at Turku Observatory in Southwest Finland, and named for Swedish geodesist Erik Tengström.
4949 Akasofu, provisional designation 1988 WE, is a stony Flora asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered by Japanese amateur astronomer Takuo Kojima at the YGCO Chiyoda Station in Japan on 29 November 1988. The asteroid was named for Japanese geophysicist Syun-Ichi Akasofu
3982 Kastelʹ, provisional designation 1984 JP1, is a Florian asteroid and a suspected binary system from the inner regions of the asteroid belt, approximately 6.9 kilometers in diameter.
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.
