Discovery [1] | |
---|---|
Discovered by | E. Bowell |
Discovery site | Anderson Mesa Stn. |
Discovery date | 3 January 1981 |
Designations | |
(3267) Glo | |
Named after |
Eleanor F. Helin (American astronomer) [2] |
1981 AA | |
Mars-crosser
[1]
[3] Phocaea [4] [5] | |
Orbital characteristics [3] | |
Epoch 23 March 2018 ( JD 2458200.5) | |
Uncertainty parameter 0 | |
Observation arc | 36.49 yr (13,329 d) |
Aphelion | 3.0178 AU |
Perihelion | 1.6424 AU |
2.3301 AU | |
Eccentricity | 0.2951 |
3.56 yr (1,299 d) | |
196.67 ° | |
0° 16m 37.56s / day | |
Inclination | 24.021° |
110.47° | |
307.73° | |
Physical characteristics | |
Mean diameter | 6.45±1.44
km
[6] 7.58±0.76 km [7] 13.56±1.1 km [8] 13.59 km (derived) [4] |
6.8782±0.0011 h [4] [a] | |
0.0607±0.011
[8] 0.0725 (derived) [4] 0.233±0.047 [7] 0.26±0.12 [6] | |
L S [9] · S (derived) [4] | |
12.8
[3]
[4]
[7] · 12.86±0.14
[9] 13.19 [6] | |
3267 Glo, provisional designation 1981 AA, is an eccentric Phocaean asteroid and sizable Mars-crosser from the inner regions of the asteroid belt, approximately 6.4 kilometers (4.0 miles) in diameter. It was discovered on 3 January 1981, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station in Flagstaff, Arizona. [1] It was later named after American astronomer Eleanor Helin. [2]
Glo is an eccentric member of the Phocaea family ( 701), [5] that orbits the Sun in the inner asteroid belt at a distance of 1.6–3.0 AU once every 3 years and 7 months (1,299 days; semi-major axis of 2.33 AU). Its orbit has an eccentricity of 0.30 and an inclination of 24 ° with respect to the ecliptic. [3]
The body's observation arc begins with its official discovery observation at Anderson Mesa in January 1981. [1]
The asteroid has been characterized as an L- and S-type asteroid by Pan-STARRS large-scale survey. [9]
PanSTARRS' photometric survey, has characterized Glo as a LS-type asteroid, a transitional spectral type between the common S-type and rather rare L-type asteroids, [9] which have very different albedos, from as low as 0.039 to as high as 0.383. [10]
A rotational lightcurve of Glo was obtained from photometric observations by Czech astronomer Petr Pravec at Ondřejov Observatory in January 2006. Lightcurve analysis gave a well-defined rotation period of 6.8782 hours with a brightness variation of 0.33 magnitude ( U=3). [4]
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Glo measures 6.45 and 13.56 kilometers in diameter and its surface has an albedo of 0.061 and 0.26, respectively. [6] [8] The Collaborative Asteroid Lightcurve Link agrees with IRAS and derives a similar albedo of 0.0725 and a diameter of 13.59 kilometers with an absolute magnitude of 12.8. [4] [a]
This minor planet was named in honor of Eleanor "Glo" Helin (1932–2009), who was a planetary scientist at JPL and a prolific discoverer of minor planets. [2] The official naming citation was published by the Minor Planet Center on 13 February 1987 ( M.P.C. 11641). [11]