(757) Portlandia
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Asteroid (757) Portlandia |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main belt asteroid |
| Major semi-axis | 2.3736 AU |
| eccentricity | 0.1089 |
| Perihelion - aphelion | 2.1152 AU - 2.6321 AU |
| Inclination of the orbit plane | 8.168 ° |
| Sidereal period | 3,657 a |
| Mean orbital velocity | 19.33 km / s |
| Physical Properties | |
| Medium diameter | 32.1 km |
| Albedo | 0.1427 |
| Rotation period | 6.58 h |
| Absolute brightness | 10,023 mag |
| Spectral class | M. |
| history | |
| Explorer | JH Metcalf |
| Date of discovery | 1908 |
| Another name | 1908 EJ |
| Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items. | |
(757) Portlandia is an asteroid of the main belt , which on 30 September 1908 by American astronomer Joel H. Metcalf in Taunton was detected.
The asteroid was named after the city of Portland in the US state of Maine .