Main-belt asteroid
357 Ninina is a large main-belt asteroid. 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. This minor planet is orbiting at a distance of from the Sun with a period of 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.
Photometric observations of 357 Ninina during 2023 provided a light curve that presents an Earth commensurate rotation period of with a brightness amplitude of in magnitude. In 2024, spin shape modelling using the light curve inversion technique show a blocky, rounded figure, with a refined rotation period of 
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