2260 Neoptolemus

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2260 Neoptolemus
Discovery[1] and designation
Discovered by Purple Mountain Observatory
Discovery date November 26, 1975
Named after
1975 WM1
Minor planet category Jupiter Trojan
Orbital characteristics[2]
Epoch February 4, 2008 (JD 2454500.5)
Aphelion 811.004 Gm (5.421 AU)
Perihelion 741.798 Gm (4.959 AU)
776.401 Gm (5.190 AU)
Eccentricity 0.045
4318.565 d (11.82 a)
13.07 km/s
Inclination 17.782°
Physical characteristics
Dimensions 71.7 km
Mass 3.9×1017 kg
Mean density
2.0 g/cm³
Equatorial surface gravity
0.0200 m/s²
Equatorial escape velocity
0.0379 km/s
Temperature ~122 K

2260 Neoptolemus is a Jupiter Trojan asteroid that orbits in the L4 Lagrangian point of the Sun-Jupiter system, in the "Greek Camp" of Trojan asteroids. It was named after the Greek hero Neoptolemus, the son of Achilles. It was discovered by the Purple Mountain Observatory in Nanjing, China on November 26, 1975.

Photometric observations of this asteroid during 2002 were used to build a light curve showing a rotation period of 8.180 ± 0.008 hours with a brightness variation of 0.32 ± 0.01 magnitude.[1]


  1. ^ Mottola, Stefano; Di Martino, Mario; Erikson, Anders; Gonano-Beurer, Maria; Carbognani, Albino; Carsenty, Uri; Hahn, Gerhard; Schober, Hans-Josef; Lahulla, Felix; Delbò, Marco; Lagerkvist, Claes-Ingvar (May 2011). "Rotational Properties of Jupiter Trojans. I. Light Curves of 80 Objects". The Astronomical Journal 141 (5): 170. Bibcode:2011AJ....141..170M. doi:10.1088/0004-6256/141/5/170.  edit

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