(11549) 1992 YY

(11549) 1992 YY
Caractéristiques orbitales
Époque (JJ 2458200,5)[1]
Établi sur 1 472 observ. couvrant 21391 jours (U = 0)
Demi-grand axe (a) 378,780 × 106 km[1]
(2,531 99 ua)
Périhélie (q) 344,949 × 106 km[1]
(2,305 84 ua)
Aphélie (Q) 412,611 × 106 km[1]
(2,758 13 ua)
Excentricité (e) 0,09[1]
Période de révolution (Prév) 1 472 j
(4,3 a)
Inclinaison (i) 11,44°[1]
Longitude du nœud ascendant (Ω) 268,25°[1]
Argument du périhélie (ω) 327,4°[1]
Anomalie moyenne (M0) 331,9°[1]
Catégorie Astéroïde de la ceinture principale[1],[2]
Caractéristiques physiques
Dimensions 10,539 km
Magnitude absolue (H) 12,1[1],[2]
Albédo (A) 0,225

Découverte
Date le [1],[2]
Découvert par Akira Natori et Takeshi Urata[1],[2]
Lieu Yakiimo (Japon)[2]
Désignation (11549) 1992 YY[1],[2]

(11549) 1992 YY est un astéroïde de la ceinture principale d'astéroïdes de 10,539 km de diamètre découvert en 1992.

Description

(11549) 1992 YY a été découvert le à la station astronomique de Yakiimo, située à Shimizu-ku à Shizuoka au Japon, par Akira Natori et Takeshi Urata.

Caractéristiques orbitales

L'orbite de cet astéroïde est caractérisée par un demi-grand axe de 2,53 UA, un périhélie de 2,31 UA, une excentricité de 0,09 et une inclinaison de 11,44° 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

(11549) 1992 YY a une magnitude absolue (H) de 12,1 et un albédo estimé à 0,225, ce qui permet de calculer un diamètre de 10,539 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 2014 dans un article présentant les résultats concernant 2 835 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) « (11549) 1992 YY » [html], sur le site du Jet Propulsion Laboratory (consulté le )
  2. a b c d e et f (en) « (11549) 1992 YY » [html], sur le site du Centre des planètes mineures (consulté le )
  3. (en) Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; Sonnett, S.., « Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos », The Astrophysical Journal, vol. 791, no 2,‎ (DOI 10.1088/0004-637X/791/2/121)


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