(101) Helena

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Asteroid
(101) Helena
Properties of the orbit ( animation )
Orbit type Main belt asteroid
Major semi-axis 2.582  AU
eccentricity 0.142
Perihelion - aphelion 2.216 AU - 2.948 AU
Inclination of the orbit plane 10.2 °
Length of the ascending node 343.5 °
Argument of the periapsis 347.3 °
Time of passage of the perihelion September 11, 2009
Sidereal period 4 a 54 d
Mean orbital velocity 18.4 km / s
Physical Properties
Medium diameter 66 km
Albedo 0.19
Rotation period 23.1 h
Absolute brightness 8.3 mag
Spectral class S.
history
Explorer JC Watson
Date of discovery August 15, 1868
Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items.

(101) Helena is an asteroid of the main belt . It was named after the beautiful Helena , a daughter of Zeus and Leda . The asteroid was discovered on August 15, 1868.

See also