3540 Protesilaos

Infobox Planet | minorplanet = yes | width = 25em | bgcolour = #FFFFC0
name=3540 Protesilaos
discovery=yes
discovery_ref= [http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html]
discoverer=Freimut Börngen
discovered=October 27, 1973
designations = yes
alt_names=1973 UF5
mp_category=Jupiter Trojan
orbit_ref= [ftp://ftp.lowell.edu/pub/elgb/astorb.html]
epoch=February 04, 2008 (JD 2454500.5)
semimajor=786.312 Gm (5.256 AU)
perihelion=694.827 Gm (4.645 AU)
aphelion=877.796 Gm (5.868 AU)
eccentricity=0.116
period=4401.516 d (12.05 a)
inclination=23.322°
asc_node=26.429°
arg_perihelion=115.880°
mean_anomaly=212.942°
avg_speed=12.95 km/s
physical_characteristics=yes
dimensions=? km
mass=?e|? kg
density=? g/cm³
surface_grav=? m/s²
escape_velocity=? km/s
sidereal_day=? d
axial_tilt=?° | pole_ecliptic_lat=? | pole_ecliptic_lon=?
spectral_type=?
abs_magnitude=9.0
albedo=0.10
single_temperature=~121 K

3540 Protesilaos 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 Protesilaus, who fought during the Trojan War. It was discovered by Freimut Börngen at the Karl Schwarzschild Observatory in Tautenburg,Germany on October 27, 1973.

External links

* [http://cfa-www.harvard.edu/iau/lists/NumberedMPs.txt Discovery Circumstances: Numbered Minor Planets]
* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3540;orb=1 Orbital simulation] from JPL (Java) / [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=3540 Ephemeris]