| Minorplanet: | yes |
| Background: |
|
| 289 Nenetta | |
| Discovered: | 10 March 1890 |
| Mpc Name: | (289) Nenetta |
| Epoch: | 31 July 2016 (JD 2457600.5) |
| Semimajor: | 2.87381AU |
| Perihelion: | 2.28661AU |
| Aphelion: | 3.46101abbr=onNaNabbr=on |
| Eccentricity: | 0.20433 |
| Inclination: | 6.69535° |
| Asc Node: | 182.114° |
| Arg Peri: | 189.219° |
| Rotation: | 6.902abbr=onNaNabbr=on |
| Abs Magnitude: | 9.51 |
| Mean Motion: | / day |
| Orbit Ref: | [1] |
| Observation Arc: | 113.69 yr (41526 d) |
| Uncertainty: | 0 |
289 Nenetta is an A-type asteroid with a diameter of . It was discovered by Auguste Charlois on 10 March 1890 in Nice, France. 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.[1]
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.
The spectrum of 289 Nenetta reveals the strong presence of the mineral olivine, a relative rarity in the asteroid belt.