137 Meliboea

Infobox Planet | discovery=yes | physical_characteristics = yes | bgcolour=#FFFFC0
name=137 Meliboea
discoverer=Johann Palisa
discovered=April 21, 1874
alt_names=
mp_category=Main belt
epoch=December 31, 2006 (JD 2454100.5)
semimajor=466.536 Gm (3.119 AU)
perihelion=364.057 Gm (2.434 AU)
aphelion=569.016 Gm (3.804 AU)
eccentricity=0.220
period=2011.587 d (5.51 a)
inclination=13.418°
asc_node=202.446°
arg_peri=106.741°
mean_anomaly=314.941°
avg_speed=16.66 km/s
dimensions=145.4 km
mass=3.2e|18 kg
density=? g/cm³
surface_grav=0.0406 m/s²
escape_velocity=0.0769 km/s
rotation=? d
spectral_type=C
abs_magnitude=8.05
albedo=?
single_temperature=~158 K

137 Meliboea is a large and very dark main belt asteroid. It is composed of carbonaceous materials. It is the largest body in the Meliboea family of asteroids. Only 791 Ani approaches its size. It was discovered by J. Palisa on April 21, 1874, the second of his many asteroid discoveries. It is named after one of the three Meliboeas in Greek mythology.