(190) Ismene Outer Main-belt Asteroid
Discovered on 22 September 1878 by C. H. F. Peters at Clinton.
Where Ismene is today
Seen from above the solar system on 2026-10-14: Ismene is 4.44 au from the Sun and 4.23 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 190 |
| Provisional designation | A878 SA |
| Orbit class | Outer Main-belt Asteroid |
| Diameter | 159 km (#72 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0660 |
| Rotation period | 6.52 hours |
| Spectral type | P |
| Absolute magnitude (H) | 7.88 |
| Orbital period | 7.99 years |
| Semi-major axis | 4.00 au |
| Perihelion – aphelion | 3.32 – 4.67 au |
| Eccentricity | 0.168 |
| Inclination | 6.17° |
| Closest distance between its orbit and Earth's (MOID) | 2.35 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
More named asteroids discovered by C. H. F. Peters
- (72) Feronia
- (75) Eurydike
- (77) Frigga
- (85) Io
- (88) Thisbe
- (92) Undina
- (98) Ianthe
- (102) Miriam
- (109) Felicitas
- (111) Ate
- (112) Iphigenia
- (114) Kassandra
← (189) Phthia · (191) Kolga →