| Minorplanet: | yes |
| Background: |
|
| 202 Chryseïs | |
| Discovered: | 11 September 1879 |
| Mpc Name: | (202) Chryseïs |
| Alt Names: | A879 RA, A901 TA 1935 BL |
| Pronounced: | [1] |
| Epoch: | 31 July 2016 (JD 2457600.5) |
| Semimajor: | 3.0713AU |
| Perihelion: | 2.7567AU |
| Aphelion: | 3.3859abbr=onNaNabbr=on |
| Eccentricity: | 0.10244 |
| Period: | 5.38 yr (1966.0 d) |
| Inclination: | 8.8535° |
| Asc Node: | 136.848° |
| Arg Peri: | 1.3159° |
| Avg Speed: | 16.99 km/s |
| Rotation: | 23.67abbr=onNaNabbr=on 23.670 ± 0.001 h |
| Abs Magnitude: | 7.42 |
| Mean Motion: | / day |
| Orbit Ref: | [2] |
| Observation Arc: | 136.57 yr (49881 d) |
| Uncertainty: | 0 |
202 Chryseïs is a large, lightly coloured Main belt asteroid that is probably composed of silicate rocks. It was discovered by C. H. F. Peters on September 11, 1879, in Clinton, New York, and was named after the mythical Trojan woman Chryseis.
The rotation period for this asteroid is close to a day long, so the construction of a complete light curve requires photometric observations from multiple locations at widely spaced latitudes. This task was completed in January and February, 2011, yielding a synodic rotation period of 23.670 ± 0.001 h, with a brightness variation of 0.20 ± 0.02 in magnitude