| Minorplanet: | yes |
| Mpc Name: | (190) Ismene |
| Background: |
|
| 190 Ismene | |
| Alt Names: | A878 SA; 1947 QJ; 1951 DB |
| Pronounced: | [1] |
| Mp Category: | Main belt (Hilda) |
| Semimajor: | 3.9864AU |
| Perihelion: | 3.3248AU |
| Aphelion: | 4.648abbr=onNaNabbr=on |
| Period: | 7.96 yr (2907.2 d) |
| Inclination: | 6.1772° |
| Eccentricity: | 0.16597 |
| Rotation: | 6.52abbr=onNaNabbr=on3 |
| Albedo: | 0.066 |
| Abs Magnitude: | 7.77 7.59 |
| Discoverer: | C. H. F. Peters, 1878 |
| Discovered: | 22 September 1878 |
| Epoch: | 31 July 2016 (JD 2457600.5) |
| Asc Node: | 175.48° |
| Arg Peri: | 271.47° |
| Mean Motion: | / day |
| Observation Arc: | 121.44 yr (44357 d) |
| Uncertainty: | 0 |
| Mean Radius: | [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.