| b>103 Hera |
| bgcolor="#ffc0c0" colspan="2" | Orbital characteristics 1 |
| a href="/encyclopedia/Orbit" title="Orbit">Orbit type | Main belt |
| a href="/encyclopedia/Semimajor-axis" title="Semimajor axis">Semimajor axis | 2.704 AU |
| a href="/encyclopedia/Perihelion" title="Perihelion">Perihelion distance | 2.490 AU |
| a href="/encyclopedia/Aphelion" title="Aphelion">Aphelion distance | 2.918 AU |
| a href="/encyclopedia/Orbital-period" title="Orbital period">Orbital period | 4.45 years |
| a href="/encyclopedia/Inclination" title="Inclination">Inclination | 5.42° |
| a href="/encyclopedia/Eccentricity" title="Eccentricity">Eccentricity | 0.079 |
| bgcolor="#ffc0c0" colspan="2" | Physical characteristics 1 |
| a href="/encyclopedia/Diameter" title="Diameter">Diameter | 91.2 km |
| a href="/encyclopedia/Rotation-period" title="Rotation period">Rotation period | 23.74 hours |
| a href="/encyclopedia/Spectral-class" title="Spectral class">Spectral class | S |
| a href="/encyclopedia/Absolute-magnitude" title="Absolute magnitude">Abs. magnitude | 7.66 |
| a href="/encyclopedia/Albedo" title="Albedo">Albedo 4 | 0.183 |
| bgcolor="#ffc0c0" colspan="2" | History 2 |
| iscoverer | J. C. Watson, 1868 |