258 Tyche
Encyclopedia : 2 : 25 : 258 : 258 Tyche
| Orbital elements | |
|---|---|
| Eccentricity (orbit)>e | |
| Inclination>i | ° |
| Perihelion>q |
|
| Argument of perihelion>ω | ° |
| Semi-major axis>a | AU |
| Longitude of the ascending node>ω | ° |
| Aphelion>Q |
|
| Mean anomaly>M | ° |
| Orbital period>P | years |
| Mean motion>n | °/day |
| Time of perihelion passage>TP | |
258 Tyche is a relatively large Main belt asteroid. It is classified as an S-type and is probably composed of a mixture of silicates and metals. 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. Various authors give values from 9.983 to 10.041 hours.
It was discovered by Robert Luther on May 4, 1886 in Düsseldorf and was named after Greek goddess Tyche. Tyche's Roman equivalent is Fortuna who also has an asteroid named after her (19 Fortuna).
References
- [The Asteroid Orbital Elements Database]
- [Minor Planet Discovery Circumstances]
- [Asteroid Lightcurve Data File]
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