 Orbital diagram | |
| Discovery | |
|---|---|
| Discovered by | Christian Heinrich Friedrich Peters |
| Discovery date | September 22, 1862 |
| Designations | |
| MPC designation | (75) Eurydike |
| Pronunciation | /jʊˈrɪdɪkiː/ |
| Named after | Eurydice |
| Minor planet category | Main belt |
| Adjectives | Eurydikean /ˌjʊərɪdɪˈkiːən/ |
| Orbital characteristics | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 521.874 Gm (3.489 AU) |
| Perihelion | 278.028 Gm (1.858 AU) |
| Semi-major axis | 399.951 Gm (2.674 AU) |
| Eccentricity | 0.305 |
| Orbital period (sidereal) | 1596.687 d (4.37 a) |
| Average orbital speed | 17.79 km/s |
| Mean anomaly | 26.318° |
| Inclination | 5.002° |
| Longitude of ascending node | 359.481° |
| Argument of perihelion | 339.566° |
| Physical characteristics | |
| Dimensions | 62.377 ± 1.603 km |
| Mass | (4.46 ± 2.06/1.06)×10 kg |
| Mean density | 3.511 ± 1.618/0.837 g/cm |
| Synodic rotation period | 5.357 h |
| Geometric albedo | 0.149 |
| Spectral type | M |
| Absolute magnitude (H) | 9.29 |
75 Eurydike is a large main-belt asteroid. It has an M-type spectrum and a relatively high albedo and may be rich in nickel-iron. Eurydike was discovered by German-American astronomer C. H. F. Peters on September 22, 1862. It was second of his numerous asteroid discoveries and is named after Eurydice, the wife of Orpheus. The asteroid is orbiting the Sun for a period of 4.37 years and completes a rotation about its axis every 5.4 hours.
References
- 'Eurydice' in Noah Webster (1884) A Practical Dictionary of the English Language
- ^ "75 Eurydike". JPL Small-Body Database. Jet Propulsion Laboratory. SPK-ID: 20000075. Retrieved 29 March 2024.
- ^ Fienga, A.; Avdellidou, C.; Hanuš, J. (February 2020). "Asteroid masses obtained with INPOP planetary ephemerides". Monthly Notices of the Royal Astronomical Society. 492 (1): 589–602. doi:10.1093/mnras/stz3407.
- Asteroid Data Sets Archived 2009-12-17 at the Wayback Machine
- ^ Busarev, V. V. (January 1998). "Spectral Features of M-Asteroids: 75 Eurydike and 201 Penelope". Icarus. 131 (1): 32–40. Bibcode:1998Icar..131...32B. doi:10.1006/icar.1997.5847.
External links
- 75 Eurydike at AstDyS-2, Asteroids—Dynamic Site
- 75 Eurydike at the JPL Small-Body Database
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