| Minor Planet Designation | 3361 Orpheus | | Asteroid Group | Apollo Group | | Orbital Period | 1.33 years | | Distance from the Sun | Semi-Major Axis: 180,923,664 km (1.21 AU)
Perihelion: 122,507,031 km (0.82 AU)
Aphelion: 239,340,296 km (1.60 AU) | | Eccentricity | 0.3228 | | Diameter (Mean) | 300 metres | | Notes | As a member of the Apollo Group, Orpheus' orbit carries it through the inner Solar System, intersecting the orbits of Venus, Earth and Mars. In 2013 it passed within some 15 million kilometres of Earth, and its nearest theoretical approach is closer still: just over two million kilometres. |
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