(757) Portlandia
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 .