289 Nenetta is an A-type asteroid with a diameter of . The asteroid is orbiting the Sun at a distance of with an eccentricity (ovalness) of 0.204 and an orbital period of . The orbital plane is inclined at an angle of 6.7° to the plane of the ecliptic.
Discovery
It was discovered by Auguste Charlois on 10 March 1890 in Nice, France.
Physical characteristics Rotation Photometric observations taken in 2018 provided a light curve showing a synodic rotation period of for the asteroid with an amplitude of in magnitude. This result is mostly consistent with previous measurements.
Surface and spectrum The spectrum of 289 Nenetta reveals the strong presence of the mineral olivine, a relative rarity in the asteroid belt. Nenetta's spectrum is similar to those of the angrite meteorites.
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