357 Ninina
Main-belt asteroid
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357 Ninina is a large main-belt asteroid.[1] It was discovered by Auguste Charlois on February 11, 1893, in Nice. The reference of its name is not known, though Ninine is a French personal name.[3] This minor planet is orbiting at a distance of 3.16 AU from the Sun with a period of 5.61 years and an orbital eccentricity (ovalness) of 0.074. The orbital plane is inclined at an angle of 15.1° to the plane of the ecliptic.[1]
Lightcurve-base 3D-model of 357 Ninina. | |
| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | 11 February 1893 |
| Designations | |
| (357) Ninina | |
| 1893 J | |
| Main belt | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 108.56 yr (39650 d) |
| Aphelion | 3.38973 AU (507.096 Gm) |
| Perihelion | 2.92272 AU (437.233 Gm) |
| 3.15623 AU (472.165 Gm) | |
| Eccentricity | 0.073982 |
| 5.61 yr (2,048.1 d) | |
| 144.322° | |
| 0° 10m 32.783s / day | |
| Inclination | 15.0642° |
| 137.809° | |
| 254.250° | |
| Physical characteristics | |
| Dimensions | 97+7 −8 km[2] |
| 36.0105 h (1.50044 d) | |
| 0.0510±0.002 | |
| 8.72 | |
Photometric observations of 357 Ninina during 2023 provided a light curve that presents an Earth commensurate rotation period of 36.00±0.01 h with a brightness amplitude of 0.08±0.01 in magnitude.[4] In 2024, spin shape modelling using the light curve inversion technique show a blocky, rounded figure, with a refined rotation period of 35.9840±0.0005 h[5]
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