1239 Queteleta

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1239 Queteleta
Discovery [1]
Discovered by E. Delporte
Discovery site Uccle Obs.
Discovery date 4 February 1932
MPC designation (1239) Queteleta
Pronunciation kətlɛta
Named after
Adolphe Quetelet[2]
(Belgian astronomer)
1932 CB · 1978 TH3
main-belt · (middle)
background [3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 85.80 yr (31,340 d)
Aphelion 3.2824 AU
Perihelion 2.0383 AU
2.6603 AU
Eccentricity 0.2338
4.34 yr (1,585 days)
0° 13m 37.56s / day
Inclination 1.6619°
Physical characteristics
Dimensions 15.94±1.8 km[4]
18.032±0.076 km[5]
12.4[1] · 12.5[4]

1239 Queteleta (kətlɛta), provisional designation 1932 CB, is a dark background asteroid from the central regions of the asteroid belt, approximately 17 kilometers in diameter. It was discovered on 4 February 1932, by Belgian astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle.[6] The asteroid was named after Adolphe Quetelet, a Belgian astronomer and mathematician.[2]


Queteleta was discovered on 4 February 1932, by Belgian astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle.[6] It was independently discovered by Louis Boyer at Algiers Observatory, Algeria, on the same night and by George Van Biesbroeck at Yerkes Observatory, United States, on 13 February 1932.[2] The Minor Planet Center only recognizes the first mentioned discoverer.[6]

Orbit and classification[edit]

Queteleta is a non-family asteroid from the main belt's background population.[3] It orbits the Sun in the central main-belt at a distance of 2.0–3.3 AU once every 4 years and 4 months (1,585 days; semi-major axis of 2.66 AU). Its orbit has an eccentricity of 0.23 and an inclination of 2° with respect to the ecliptic.[1] The body's observation arc begins at with its official discovery observation at Uccle in 1932.[6]

Physical characteristics[edit]

The asteroid's spectral type has not been determined,[1] but its low albedo (see below) is typical for that of a carbonaceous C-type asteroid.

Diameter and albedo[edit]

According to the surveys carried out by the Infrared Astronomical Satellite IRAS and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Queteleta measures 15.94 and 18.032 kilometers in diameter and its surface has an albedo of 0.0695 and 0.051, respectively.[4][5]

Rotation period, poles and shape[edit]

As of 2018, no rotational lightcurve of Queteleta has been obtained from photometric observations. The asteroid's rotation period, shape and poles remain unknown.[1][7]


This minor planet was named after Belgian astronomer and mathematician Adolphe Quetelet (1796–1874), whose research also encompassed several other scientific disciplines such as statistics, demography, sociology, criminology and the history of science. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 114). He was also honored by the lunar crater Quetelet.[2]


  1. ^ a b c d e f "JPL Small-Body Database Browser: 1239 Queteleta (1932 CB)" (2017-11-24 last obs.). Jet Propulsion Laboratory. Retrieved 4 January 2018. 
  2. ^ a b c d Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1239) Queteleta. Springer Berlin Heidelberg. p. 103. ISBN 978-3-540-00238-3. Retrieved 4 January 2018. 
  3. ^ a b "Small Bodies Data Ferret". Nesvorny HCM Asteroid Families V3.0. Retrieved 4 January 2018. 
  4. ^ a b c d 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. Archived from the original on 2016-06-03. Retrieved 4 January 2018. 
  5. ^ a b c Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv:1109.4096Freely accessible. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 4 January 2018. 
  6. ^ a b c d "1239 Queteleta (1932 CB)". Minor Planet Center. Retrieved 4 January 2018. 
  7. ^ "LCDB Data for (1239) Queteleta". Asteroid Lightcurve Database (LCDB). Retrieved 4 January 2018. 

External links[edit]