Discovery [1] | |
---|---|
Discovered by | Indiana University (Indiana Asteroid Program) |
Discovery site | Goethe Link Obs. |
Discovery date | 9 September 1959 |
Designations | |
(2065) Spicer | |
Named after | Edward H. Spicer (American anthropologist) [2] |
1959 RN ·1952 BS1 1955 XC ·1968 QX 1973 YR2 | |
main-belt ·(middle) [3] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 (JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 60.34 yr (22,038 days) |
Aphelion | 3.3313 AU |
Perihelion | 2.0659 AU |
2.6986 AU | |
Eccentricity | 0.2345 |
4.43 yr (1,619 days) | |
350.70° | |
0° 13m 20.28s / day | |
Inclination | 6.4348° |
328.09° | |
66.381° | |
Physical characteristics | |
Dimensions | 16.721±0.088 km [4] [5] 18.43 km (calculated) [3] |
18.165±0.005 h [6] [a] | |
0.057 (assumed) [3] 0.062±0.007 [4] [5] | |
SMASS = Xc [1] · P [4] · X [3] | |
12.03±0.23 [7] ·12.2 [4] ·12.4 [1] [3] | |
2065 Spicer, provisional designation 1959 RN, is a dark and eccentric asteroid from the middle region of the asteroid belt, approximately 17 kilometers in diameter.
The asteroid was discovered on 9 September 1959, by the Indiana Asteroid Program at Goethe Link Observatory near Brooklyn, Indiana, United States, and named after American anthropologist Edward H. Spicer. [2] [8]
Spicer orbits the Sun in the central main-belt at a distance of 2.1–3.3 AU once every 4 years and 5 months (1,619 days). Its orbit has an eccentricity of 0.23 and an inclination of 6° with respect to the ecliptic. [1]
Spicer's spectra is that of an X-type and Xc-type in SMASS classification scheme, which indicates a transitional stage to the carbonaceous C-type asteroid. [1] It has also been characterized as a P-type asteroid by the NEOWISE mission. [4]
In January 2005, photometric measurements of Spicer made by American astronomer Brian Warner at the Palmer Divide Observatory ( 716 ) gave a lightcurve with a well-defined rotation period of 18.165±0.005 hours and a brightness variation of 1.0±0.03 magnitude ( U=3 ). [6] [a]
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Spicer measures 16.721 kilometers in diameter and its surface has an albedo of 0.062, [4] [5] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 18.43 kilometers with an absolute magnitude of 12.4. [3]
This minor planet was named after American anthropologist Edward H. Spicer (1906–1983), professor at the University of Arizona, and a former president of the American Anthropological Association. [2]
In 1955, Spicer's negotiations with the local district and tribal councils were instrumental for receiving permission to evaluate the location where the Kitt Peak National Observatory was later built. [2] The official naming citation was published by the Minor Planet Center on 26 May 1983 ( M.P.C. 7944). [9]