Tags: Planet.

258 Tyche is a relatively large main belt asteroid discovered in 1886. It is classified as an S-type. Tyche orbits very close to the Eunomia family of asteroids and could be a member based on composition. However it is larger than all family members apart from 15 Eunomia while lying at the very edge of the family group. Hence there is a good chance that it is an unrelated interloper.There is some uncertainty regarding Tyche’s rotation period.

258Tyche_(Lightcurve_Inversion).png
apoapsis (km)
4.71289e+11
average speed (km/s)
66312.0
density (μ3)
2700.0
orbital period (μ)
1.33432e+08
periapsis (km)
3.11048e+11
temperature (K)
169.0, 268.0
absolute magnitude
8.5
albedo
0.168
discovery date
1886-05-04
discoverer
Robert Luther
epoch
30 January 2005 (JD 2453400.5)
escape velocity (kmh)
144.0
former name
none
rotation period (s)
36028.8

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