1866 Sisyphus

1866 Sisyphus

Minor Planet
name=1866 Sisyphus
discoverer=Paul Wild
discovery_date=December 5, 1972
designations=1972 XA
category=Apollo, Mars crosser
epoch=December 1, 2005 (JD 2453705.5)
semimajor=283.343 Gm (1.894 AU)
perihelion=130.751 Gm (0.874 AU)
aphelion=435.936 Gm (2.914 AU)
eccentricity=0.539
period=952.094 d (2.607 a)
inclination=41.181°
asc_node=63.600°
arg_peri=293.033°
mean_anomaly=261.365°
speed=19.977 km/s
dimensions=8.5 km
mass=?? kg
density= ? g/cm³
gravity=? m/s²
escape_velocity=? km/s
rotation=.1 d
spectral_class=S
abs_mag=12.237
albedo=.160
temperature=~? K

1866 Sisyphus ("sis'-ə-fəs") is an Apollo asteroid which, at approximately 10 km in diameter, is the largest of the Earth-crossing asteroids. It is comparable in size to the Chicxulub object whose impact may have killed off the dinosaurs.

Sisyphus was discovered in 1972 by Paul Wild, and named after the Sisyphus of Greek mythology.


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