 Orbital diagram | |
| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | 10 March 1890 |
| Designations | |
| MPC designation | (289) Nenetta |
| Minor planet category | Main belt |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 113.69 yr (41526 d) |
| Aphelion | 3.46101 AU (517.760 Gm) |
| Perihelion | 2.28661 AU (342.072 Gm) |
| Semi-major axis | 2.87381 AU (429.916 Gm) |
| Eccentricity | 0.20433 |
| Orbital period (sidereal) | 4.87 yr (1,779.4 d) |
| Mean anomaly | 104.307° |
| Mean motion | 0° 12 8.316 / day |
| Inclination | 6.69535° |
| Longitude of ascending node | 182.114° |
| Argument of perihelion | 189.219° |
| Physical characteristics | |
| Dimensions | 37.586±1.002 km |
| Synodic rotation period | 6.902 h (0.2876 d) |
| Geometric albedo | 0.2438±0.042 |
| Absolute magnitude (H) | 9.51 |
289 Nenetta is an A-type asteroid with a diameter of 38 km. It was discovered by Auguste Charlois on 10 March 1890 in Nice, France. The asteroid is orbiting the Sun at a distance of 2.87 AU with an eccentricity (ovalness) of 0.204 and an orbital period of 4.87 yr. The orbital plane is inclined at an angle of 6.7° to the plane of the ecliptic.
Photometric observations taken in 2018 provided a light curve showing a synodic rotation period of 6.916±0.001 h for the asteroid with an amplitude of 0.20±0.02 in magnitude. This result is mostly consistent with previous measurements.
The spectrum of 289 Nenetta reveals the strong presence of the mineral olivine, a relative rarity in the asteroid belt.
References
- ^ "289 Nenetta". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 11 May 2016.
- Schmadel, Lutz (5 August 2003), Dictionary of minor planet names, Springer, p. 40, ISBN 9783540002383.
- Pilcher, Frederick (October 2018), "New Lightcurves of 33 Polyhymnia, 49 Pales, 289 Nenetta 504 Cora, and 821 Fanny", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, 45 (4): 356–359, Bibcode:2018MPBu...45..356P.
- Burbine, T. H.; et al. (July 2000), "The Nature of Olivine Asteroids" (PDF), Meteoritics & Planetary Science, vol. 35, pp. A35, Bibcode:2000M&PSA..35R..35B, doi:10.1111/j.1945-5100.2000.tb01796.x.
External links
- 289 Nenetta at AstDyS-2, Asteroids—Dynamic Site
- 289 Nenetta at the JPL Small-Body Database
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