120 Lachesis

Infobox Planet | discovery=yes | physical_characteristics = yes | bgcolour=#FFFFC0
name=120 Lachesis
discoverer=Alphonse Borrelly
discovered=April 10, 1872
alt_names=
mp_category=Main belt
epoch=December 31, 2006 (JD 2454100.5)
semimajor=466.154 Gm (3.116 AU)
perihelion=438.480 Gm (2.931 AU)
aphelion=493.828 Gm (3.301 AU)
eccentricity=0.059
period=2009.115 d (5.50 a)
inclination=6.954°
asc_node=341.511°
arg_peri=232.006°
mean_anomaly=150.174°
avg_speed=16.86 km/s
dimensions=174.1 km
mass=5.5e|18 kg
density=? g/cm³
surface_grav=0.0487 m/s²
escape_velocity=0.0920 km/s
rotation=? d
spectral_type=C
abs_magnitude=7.75
albedo=?
single_temperature=~158 K

120 Lachesis is a very large and very dark main belt asteroid. As a primitive C-type asteroid it is likely composed of carbonaceous material. It was discovered by Alphonse Borrelly on April 10, 1872 and named after one of the Moirae, or Fates, in Greek mythology. The only observed Lachesean occultation occurred in 1999 and was recorded in the south-western United States.