| Discovery | |
|---|---|
| Discovered by | Max Wolf |
| Discovery site | Heidelberg Observatory |
| Discovery date | 11 March 1918 |
| Designations | |
| MPC designation | (890) Waltraut |
| Minor planet category | main-belt Eos |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 95.39 yr (34842 days) |
| Aphelion | 3.2017 AU (478.97 Gm) |
| Perihelion | 2.8415 AU (425.08 Gm) |
| Semi-major axis | 3.0216 AU (452.02 Gm) |
| Eccentricity | 0.059606 |
| Orbital period (sidereal) | 5.25 yr (1918.5 d) |
| Mean anomaly | 174.471° |
| Mean motion | 0° 11 15.54 / day |
| Inclination | 10.872° |
| Longitude of ascending node | 160.683° |
| Argument of perihelion | 90.307° |
| Physical characteristics | |
| Mean radius | 13.665±0.85 km |
| Synodic rotation period | 12.581 h (0.5242 d) |
| Geometric albedo | 0.1153±0.016 |
| Absolute magnitude (H) | 10.78 |
890 Waltraut is an Eoan asteroid from the outer region of the asteroid belt that was discovered by German astronomer Max Wolf on 11 March 1918. It was named for a character in Richard Wagner's opera, Götterdämmerung (Twilight of the Gods).
This is a member of the dynamic Eos family of asteroids that most likely formed as the result of a collisional breakup of a parent body.
References
- Discovery Circumstances: Numbered Minor Planets
- Yeomans, Donald K., "890 Waltraut", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 3 May 2016.
- Veeder, G. J.; et al. (March 1995), "Eos, Koronis, and Maria family asteroids: Infrared (JHK) photometry" (PDF), Icarus, vol. 114, pp. 186–196, Bibcode:1995Icar..114..186V, CiteSeerX 10.1.1.31.2739, doi:10.1006/icar.1995.1053.
External links
- 890 Waltraut at AstDyS-2, Asteroids—Dynamic Site
- 890 Waltraut at the JPL Small-Body Database
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