 Orbital diagram | |
| Discovery | |
|---|---|
| Discovered by | Viktor Knorre |
| Discovery date | 7 April 1880 |
| Designations | |
| MPC designation | (215) Oenone |
| Pronunciation | /iːˈnoʊniː/ |
| Named after | Oenōnē |
| Alternative designations | A880 GA |
| Minor planet category | Main belt |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 110.31 yr (40,289 d) |
| Aphelion | 2.87 AU (428.78 Gm) |
| Perihelion | 2.67 AU (398.77 Gm) |
| Semi-major axis | 2.77 AU (413.78 Gm) |
| Eccentricity | 0.036257 |
| Orbital period (sidereal) | 4.60 yr (1,680.2 d) |
| Average orbital speed | 17.91 km/s |
| Mean anomaly | 90.9597° |
| Mean motion | 0° 12 51.343 / day |
| Inclination | 1.68583° |
| Longitude of ascending node | 25.0036° |
| Argument of perihelion | 315.903° |
| Physical characteristics | |
| Dimensions | 35.51±0.9 km |
| Synodic rotation period | 27.937 h (1.1640 d) |
| Geometric albedo | 0.2044±0.011 |
| Spectral type | S |
| Absolute magnitude (H) | 9.4 |
215 Oenone is a typical main belt asteroid. It was discovered by the Russian astronomer Viktor Knorre on April 7, 1880, in Germany, and was the second of his four asteroid discoveries. The asteroid is named after Oenone, a nymph in Greek mythology.
This body is orbiting the Sun with a period of 4.60 years and a low ellipticity (ovalness) of 0.036. The orbital plane is inclined by 1.7° to the plane of the ecliptic. Light curve data gives a synodic rotation period of 27.93±0.01 h, during which it varies in brightness with an amplitude of 0.18±0.02 magnitudes. The cross-section diameter is 36 km. It is classified as an S-type asteroid in the Tholen taxonomy, suggesting a siliceous (stony) composition.
A search of quasi-complanar asteroids has shown that 215 Oenone and 1851 ≡ 1950 VA can approach to within 600 km of each other, one of the closest known potential proximities of astronomical bodies.
References
- Noah Webster (1884) A Practical Dictionary of the English Language
- ^ "215 Oenone". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Archived from the original on 20 September 2020. Retrieved 12 May 2016.
- Schmadel, Lutz D. (11 November 2013), Dictionary of Minor Planet Names, Berlin Heidelberg: Springer, p. 50, ISBN 9783662066157
- Pilcher, Frederick (July 2013), "Three Asteroids with Changing Lightcurves: 12 Victoria, 177 Irma, and 215 Oenone", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, 40 (3): 161–163, Bibcode:2013MPBu...40..161P
- Lazović, J.; Kuzmanoski, M. (1979), "Perturbing Effects of the Asteroid 215 Oenone on the Asteroid 1851 = 1950 VA During their Proximity" (PDF), Publications of the Department of Astronomy – Beograd, 9, retrieved 24 November 2020
External links
- The Asteroid Orbital Elements Database
- Minor Planet Discovery Circumstances
- 215 Oenone at AstDyS-2, Asteroids—Dynamic Site
- 215 Oenone at the JPL Small-Body Database
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