190 Ismene

190 Ismene
Discovery
Discovered by C. H. F. Peters, 1878
Designations
Main belt (Hilda)
Orbital characteristics[1]
Aphelion 4.648 AU
Perihelion 3.319 AU
3.984 AU
Eccentricity 0.167
7.95 years
Inclination 6.17°
Physical characteristics
6.52 hours 3
Albedo 0.058
Spectral type
 P
7.77[2]

    190 Ismene is a very large main belt asteroid. It was discovered by German-American astronomer C. H. F. Peters on September 22, 1878 in Clinton, New York and named after Ismene, the sister of Antigone in Greek mythology.

    Being a P-type asteroid, it has a very dark surface. Ismene orbits near the outer edge of the asteroid belt. It is one of the largest members of the Hilda asteroid family, which are locked in 3:2 resonance with the planet Jupiter.[3]

    References

    1. ↑ Yeomans, Donald K., "190 Ismene", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), retrieved 2013-03-25.
    2. ↑ Warner, Brian D. (December 2007), "Initial Results of a Dedicated H-G Project", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers 34: 113–119, Bibcode:2007MPBu...34..113W.
    3. ↑ Dahlgren, M.; Lagerkvist, C.-I. (October 1995), "A study of Hilda asteroids. I. CCD spectroscopy of Hilda asteroids", Astronomy and Astrophysics 302: 907, Bibcode:1995A&A...302..907D.