3267 Glo

From Wikipedia, the free encyclopedia
Jump to: navigation, search
3267 Glo
Discovery [1]
Discovered by E. Bowell
Discovery site Anderson Mesa Stn.
Discovery date 3 January 1981
MPC designation (3267) Glo
Named after
Eleanor F. Helin
(American astronomer)[2]
1981 AA
Orbital characteristics[1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 36.01 yr (13,153 days)
Aphelion 3.0171 AU
Perihelion 1.6435 AU
2.3303 AU
Eccentricity 0.2947
3.56 yr (1,299 days)
0° 16m 37.56s / day
Inclination 24.010°
Earth MOID 0.7365 AU
Physical characteristics
Dimensions 6.45±1.44 km[5]
13.56±1.1 km[6]
13.59 (derived)[4]
6.8782±0.0011 h[4][a]
0.0725 (derived)[4]
S[4] · LS [7]
12.8[1][4] · 12.86±0.14[7] · 13.19[5]

3267 Glo, provisional designation 1981 AA, is an eccentric Phocaea asteroid and Mars-crosser from the inner regions of the asteroid belt, approximately 13 kilometers[5] in diameter. It was discovered on 3 January 1981, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station in Flagstaff, Arizona.[3] It was later named after American astronomer Eleanor Helin.[2]

Orbit and classification[edit]

Glo is an eccentric member of the Phocaea family, that orbits the Sun in the inner main-belt at a distance of 1.6–3.0 AU once every 3 years and 7 months (1,299 days). Its orbit has an eccentricity of 0.29 and an inclination of 24° with respect to the ecliptic.[1]

The body's observation arc begins with its official discovery observation at Anderson Mesa, as no prior observations were taken.[3]

Physical characteristics[edit]

Spectral type[edit]

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,[7] which have very different albedos, from as low as 0.039 to as high as 0.383.[8]

Rotation period[edit]

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]

Diameter and albedo[edit]

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.[5][6] The Collaborative Asteroid Lightcurve Link agrees with IRAS and derives an 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, a prolific discoverer of minor planets and planetary scientist at JPL.[2] The official naming citation was published on 13 February 1987 (M.P.C. 11641).[9]


  1. ^ a b Lightcurve plot of 3267 Glo giving a rotation period of 6.8782 hours with an amplitude of 0.0329 magnitude, taken from unpublished data of the Ondrejov Asteroid Photometry Project. Summary figures at LCDB


  1. ^ a b c d e "JPL Small-Body Database Browser: 3267 Glo (1981 AA)" (2017-01-07 last obs.). Jet Propulsion Laboratory. Retrieved 9 March 2017. 
  2. ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (3267) Glo. Springer Berlin Heidelberg. p. 272. ISBN 978-3-540-00238-3. Retrieved 9 March 2017. 
  3. ^ a b c "3267 Glo (1981 AA)". Minor Planet Center. Retrieved 9 March 2017. 
  4. ^ a b c d e f g h "LCDB Data for (3267) Glo". Asteroid Lightcurve Database (LCDB). Retrieved 9 March 2017. 
  5. ^ a b c d e Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv:1606.08923Freely accessible. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63. Retrieved 9 March 2017. 
  6. ^ a b c Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. Bibcode:2004PDSS...12.....T. Retrieved 9 March 2017. 
  7. ^ a b c Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 28 April 2017. 
  8. ^ "JPL Small-Body Database Search Engine: "spectral type = L (SMASSII)"". JPL Solar System Dynamics. Retrieved 28 April 2017. 
  9. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 9 March 2017. 

External links[edit]