(431) Nepheles
Asteroid (431) Nephele |
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Properties of the orbit ( animation ) | |
Orbit type | Outer main belt |
Asteroid family | Themis family |
Major semi-axis | 3.145 AU |
eccentricity | 0.17 |
Perihelion - aphelion | 2.612 AU - 3.678 AU |
Inclination of the orbit plane | 1.8 ° |
Length of the ascending node | 117.2 ° |
Argument of the periapsis | 216.2 ° |
Time of passage of the perihelion | 2nd August 2018 |
Sidereal period | 5 a 204 d |
Mean orbital velocity | 16.7 km / s |
Physical Properties | |
Medium diameter | 101.900 ± 0.988 km |
Albedo | 0.055 |
Rotation period | 21 h 26 min |
Absolute brightness | 8.72 likes |
Spectral class | B. |
history | |
Explorer | A. Charlois |
Date of discovery | December 18, 1897 |
Another name | 1897 DN |
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. |
(431) Nephele is an asteroid of the main inner asteroid belt discovered on December 18, 1897 by the French astronomer Auguste Charlois at the Observatory of Nice .
The asteroid is named after Nephele , a figure from Greek mythology.
Nephele orbits the Sun at a distance of 2.612 ( perihelion ) to 3.678 ( aphelion ) astronomical units in 5.58 years . The orbit is inclined 1.828 ° to the ecliptic , the orbital eccentricity is 0.170.
Nephele is about 95 kilometers in diameter. It is a type B asteroid and belongs to the Themis family.