- 59 Elpis
Infobox Planet | discovery=yes | physical_characteristics = yes | bgcolour=#FFFFC0
name=59 Elpis
discoverer=Jean Chacornac
discovered=September 12 ,1860
alt_names=
mp_category=Main belt
epoch=December 31 ,2006 (JD 2454100.5)
semimajor=406.216 Gm (2.715 AU)
perihelion=358.808 Gm (2.398 AU)
aphelion=453.624 Gm (3.032 AU)
eccentricity=0.117
period=1634.355 d (4.47 a)
inclination=8.631°
asc_node=170.209°
arg_peri=210.901°
mean_anomaly=246.848°
avg_speed=18.01 km/s
dimensions=164.8 km
mass=4.7e|18 kg
density=? g/cm³
surface_grav=0.0461 m/s²
escape_velocity=0.0871 km/s
rotation=? d
spectral_type=C
abs_magnitude=7.93
albedo=0.044 [ [http://www.psi.edu/pds/resource/albedo.html Asteroid Data Sets ] ]
single_temperature=~169 K59 Elpis "(el'-pis," IPAEng|ˈɛlpɨs) is a very large
main belt asteroid . Being aC-type asteroid it is very dark and carbonaceous. Elpis was discovered by J. Chacornac onSeptember 12 ,1860 . It was his sixth and final asteroid discovery. It is named afterElpis , a personification ofhope inGreek mythology .References
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