2456 Palamedes

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2456 Palamedes
Discovery[1]
Discovered by Purple Mountain Observatory
Discovery date 30 January 1966
Designations
1966 BA1
Jupiter Trojan
Orbital characteristics[1][2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 63.01 yr (23014 days)
Aphelion 5.50783 AU (823.960 Gm)
Perihelion 4.75165 AU (710.837 Gm)
5.12974 AU (767.398 Gm)
Eccentricity 0.073706
11.62 yr (4243.66 d)
13.12 km/s
157.743°
0° 5m 5.396s / day
Inclination 13.9075°
327.393°
95.3858°
Earth MOID 3.80009 AU (568.485 Gm)
Jupiter MOID 0.118209 AU (17.6838 Gm)
Jupiter Tisserand parameter 2.937
Physical characteristics
Dimensions 91.7 km
Mean radius
45.83 ± 1.55 km
Mass 8.1×1017 kg
Mean density
2.0 g/cm³
Equatorial surface gravity
0.0256 m/s²
Equatorial escape velocity
0.0485 km/s
7.24 h (0.302 d)
0.0304 ± 0.002
Temperature ~123 K
9.3

2456 Palamedes 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 Palamedes. It was discovered by the Purple Mountain Observatory in Nanjing, China on January 30, 1966.

Photometric observations of this asteroid during 1995 were used to build a light curve showing a rotation period of 7.258 ± 0.004hours with a brightness variation of 0.05 ± 0.01 magnitude.[3]

References[edit]

  1. ^ "The Asteroid Orbital Elements Database". astorb. Lowell Observatory. 
  2. ^ "2456 Palamedes (1966 BA1)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 15 April 2016. 
  3. ^ 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. 

External links[edit]