2920 Automedon

Infobox Planet | minorplanet = yes | width = 25em | bgcolour = #FFFFC0
name=2920 Automedon
discovery=yes
discovery_ref= [http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html]
discoverer=Edward L. G. Bowell
discovered=May 3, 1981
designations = yes
alt_names=1981 JR
mp_category=Jupiter Trojan
orbit_ref= [ftp://ftp.lowell.edu/pub/elgb/astorb.html]
epoch=February 04, 2008 (JD 2454500.5)
semimajor=764.750 Gm (5.112 AU)
perihelion=743.603 Gm (4.971 AU)
aphelion=785.896 Gm (5.253 AU)
eccentricity=0.028
period=4221.719 d (11.56 a)
inclination=21.119°
asc_node=230.955°
arg_perihelion=196.132°
mean_anomaly=266.253°
avg_speed=13.17 km/s
physical_characteristics=yes
dimensions=111.0 km
mass=1.4e|18 kg
density=2.0 g/cm³
surface_grav=0.0310 m/s²
escape_velocity=0.0587 km/s
sidereal_day=? d
axial_tilt=?° | pole_ecliptic_lat=? | pole_ecliptic_lon=?
spectral_type=?
abs_magnitude=8.8
albedo=0.10
single_temperature=~123 K

2920 Automedon 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 Automedon, who fought during the Trojan War. It was discovered by Edward L. G. Bowell at the Anderson Mesa station of the Lowell Observatory on May 3, 1981.

External links

* [http://cfa-www.harvard.edu/iau/lists/NumberedMPs.txt Discovery Circumstances: Numbered Minor Planets]
* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2920;orb=1 Orbital simulation] from JPL (Java) / [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2920 Ephemeris]