 Orbital diagram | |
| Discovery | |
|---|---|
| Discovered by | C. H. F. Peters |
| Discovery date | 11 September 1879 |
| Designations | |
| MPC designation | (202) Chryseïs |
| Pronunciation | /kraɪˈsiːɪs/ |
| Named after | Chryseis |
| Alternative designations | A879 RA, A901 TA 1935 BL |
| Minor planet category | Main belt |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 136.57 yr (49881 d) |
| Aphelion | 3.3859 AU (506.52 Gm) |
| Perihelion | 2.7567 AU (412.40 Gm) |
| Semi-major axis | 3.0713 AU (459.46 Gm) |
| Eccentricity | 0.10244 |
| Orbital period (sidereal) | 5.38 yr (1966.0 d) |
| Average orbital speed | 16.99 km/s |
| Mean anomaly | 11.1527° |
| Mean motion | 0° 10 59.196 / day |
| Inclination | 8.8535° |
| Longitude of ascending node | 136.848° |
| Argument of perihelion | 1.3159° |
| Physical characteristics | |
| Dimensions | 86.15±2.4 km |
| Synodic rotation period | 23.670 h (0.9863 d) 23.670 ± 0.001 h |
| Geometric albedo | 0.2562±0.015 |
| Spectral type | S |
| Absolute magnitude (H) | 7.42 |
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
References
- Noah Webster (1884) A Practical Dictionary of the English Language
- ^ "202 Chryseis". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.
- ^ Stephens, Robert D.; et al. (October 2011), "The Lightcurve for 202 Chryseis", The Minor Planet Bulletin, 38 (4): 208–209, Bibcode:2011MPBu...38..208S.
External links
- The Asteroid Orbital Elements Database
- Asteroid Lightcurve Parameters
- Asteroid Albedo Compilation
- 202 Chryseïs at AstDyS-2, Asteroids—Dynamic Site
- 202 Chryseïs at the JPL Small-Body Database
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