(13553) Masaakikoyama

(13553) Masaakikoyama
Caractéristiques orbitales
Époque (JJ 2457000,5)
Établi sur 748 observ. couvrant 35 ans (U = 0)
Demi-grand axe (a) 327,474 4 × 106 km
(2,189 0 ua)
Périhélie (q) 175,435 92 × 106 km
(1,172 7 ua)
Aphélie (Q) 479,512 88 × 106 km
(3,205 3 ua)
Excentricité (e) 0,464 3
Période de révolution (Prév) 1 182,94 j
(3,24 a)
Inclinaison (i) 5,874 2°
Longitude du nœud ascendant (Ω) 193,53°
Argument du périhélie (ω) 109,95°
Anomalie moyenne (M0) 317,55°
Catégorie Amor, aréocroiseur
Caractéristiques physiques
Dimensions 4,8 km
Période de rotation (Prot) ? j
(38 h)
Magnitude absolue (H) 16,3
Albédo (A) 0,03

Découverte
Date
Découvert par Tsutomu Seki
Lieu Observatoire de Geisei
Nommé d'après Masaaki Koyama (en)
Désignation 1992 JE

(13553) Masaakikoyama est un astéroïde Amor de classe II découvert le par Tsutomu Seki à Geisei. Il est nommé d'après le joueur de baseball japonais Masaaki Koyama (en).

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