(11845) 1987 RZ

(11845) 1987 RZ
Caractéristiques orbitales
Époque (JJ 2458200,5)[1]
Établi sur 1 420 observ. couvrant 13354 jours (U = 0)
Demi-grand axe (a) 477,925 × 106 km[1]
(3,194 73 ua)
Périhélie (q) 377,479 × 106 km[1]
(2,523 29 ua)
Aphélie (Q) 578,371 × 106 km[1]
(3,866 17 ua)
Excentricité (e) 0,21[1]
Période de révolution (Prév) 2 086 j
(5,71 a)
Inclinaison (i) 2,03°[1]
Longitude du nœud ascendant (Ω) 125,52°[1]
Argument du périhélie (ω) 224,10°[1]
Anomalie moyenne (M0) 113,8°[1]
Catégorie Astéroïde de la ceinture principale[1],[2]
Caractéristiques physiques
Dimensions 10,046 km
Magnitude absolue (H) 13,2[1],[2]
Albédo (A) 0,072

Découverte
Date le [1],[2]
Découvert par Henri Debehogne[1],[2]
Lieu Observatoire de La Silla, au Chili[2]
Désignation (11845) 1987 RZ[1],[2]

(11845) 1987 RZ est un astéroïde de la ceinture principale d'astéroïdes de 10,046 km de diamètre découvert en 1987.

Description

(11845) 1987 RZ a été découvert le à l'observatoire de La Silla, au Chili, par Henri Debehogne.

Caractéristiques orbitales

L'orbite de cet astéroïde est caractérisée par un demi-grand axe de 3,19 UA, un périhélie de 2,52 UA, une excentricité de 0,21 et une inclinaison de 2,03° par rapport à l'écliptique[1]. Du fait de ces caractéristiques, à savoir un demi-grand axe compris entre 2 et 3,2 UA et un périhélie supérieur à 1,666 UA, il est classé, selon la JPL Small-Body Database, comme objet de la ceinture principale d'astéroïdes[1].

Caractéristiques physiques

(11845) 1987 RZ a une magnitude absolue (H) de 13,2 et un albédo estimé à 0,072, ce qui permet de calculer un diamètre de 10,046 km. Ces résultats ont été obtenus grâce aux observations du Wide-Field Infrared Survey Explorer (WISE), un télescope spatial américain mis en orbite en 2009 et observant l'ensemble du ciel dans l'infrarouge, et publiés en 2011 dans un article présentant les premiers résultats concernant les astéroïdes de la ceinture principale[3].

Voir aussi

Articles connexes

Références

  1. a b c d e f g h i j k l m n o et p (en) « (11845) 1987 RZ » [html], sur le site du Jet Propulsion Laboratory (consulté le )
  2. a b c d e et f (en) « (11845) 1987 RZ » [html], sur le site du Centre des planètes mineures (consulté le )
  3. (en) Joseph R Masiero, A. K Mainzer, T. Grav, J.M. Bauer, R.M. Cutri, J. Dailey,P.R.M. Eisenhardt, R.S. McMillan, T.B. Spahr, M.F. Skrutskie, D. Tholen, R.G. Walker, E.L. Wright, E. DeBaun, D. Elsbury, T. Gautier, S. Gomillion, A. Wilkins, « Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters », The Astrophysical Journal, vol. 741, no 2,‎ (DOI 10.1088/0004-637X/741/2/68)


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