1647 Menelaus

Infobox Planet | minorplanet = yes | width = 25em | bgcolour = #FFFFC0
name=1647 Menelaus
discovery=yes
discovery_ref= [http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html]
discoverer=Seth Barnes Nicholson
discovered=June 23, 1957
designations = yes
alt_names=1957 MK
mp_category=Jupiter Trojan
orbit_ref= [ftp://ftp.lowell.edu/pub/elgb/astorb.html]
epoch=February 04, 2008 (JD 2454500.5)
semimajor=782.759 Gm (5.232 AU)
perihelion=765.616 Gm (5.118 AU)
aphelion=799.903 Gm (5.347 AU)
eccentricity=0.022
period=4371.724 d (11.97 a)
inclination=5.644°
asc_node=240.368°
arg_perihelion=293.369°
mean_anomaly=160.599°
avg_speed=13.02 km/s
physical_characteristics=yes
dimensions=72.0 km
mass=3.9e|17 kg
density=2.0 g/cm³
surface_grav=0.0201 m/s²
escape_velocity=0.0381 km/s
sidereal_day=? d
axial_tilt=?° | pole_ecliptic_lat=? | pole_ecliptic_lon=?
spectral_type=?
abs_magnitude=10.3
albedo=0.10
single_temperature=~122 K

1647 Menelaus 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 Menelaus. It was discovered by Seth Barnes Nicholson on June 23, 1957 in Palomar, California at the Palomar Observatory.

External links

* [http://cfa-www.harvard.edu/iau/lists/NumberedMPs.txt Discovery Circumstances: Numbered Minor Planets]
* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=1647;orb=1 Orbital simulation] from JPL (Java) / [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=1647 Ephemeris]