| Minorplanet: | yes |
| Background: |
|
| 346 Hermentaria | |
| Discovered: | 25 November 1892 |
| Mpc Name: | (346) Hermentaria |
| Alt Names: | 1892 P |
| Epoch: | 31 July 2016 (JD 2457600.5) |
| Semimajor: | 2.79686AU |
| Perihelion: | 2.51443AU |
| Aphelion: | 3.07928AU |
| Eccentricity: | 0.10098 |
| Period: | 1708.5days |
| Inclination: | 8.74967° |
| Asc Node: | 91.9628° |
| Arg Peri: | 292.035° |
| Dimensions: | |
| Rotation: | 28.432NaN2 17.792NaN2 28.5232NaN2 |
| Abs Magnitude: | 7.13 |
| Mean Motion: | / day |
| Observation Arc: | 45066days |
| Uncertainty: | 0 |
346 Hermentaria is a very large main-belt asteroid. It was discovered by French astronomer Auguste Charlois on 25 November 1892, in Nice. It is probably named for the town of Herment in the region of Auvergne, France. The asteroid is orbiting the Sun with a period of 1708.5days and an eccentricity (ovalness) of 0.10. The orbital plane is inclined by 8.7° to the plane of the ecliptic.
This body has a rotation period of during which it varies in brightness with an amplitude of magnitude. It has a cross-section diameter of . 346 Hermentaria is classified as a (stony) S-type asteroid, indicating a siliceous mineralogical composition. The near infrared spectra of this object show absorption features that suggest a mix of the minerals clinopyroxene and orthopyroxene. It may be thermally–evolved, having at least partially melted at some point. The overall shape resembles a prolate spheroid.