(25) Phocaea
Asteroid (25) Phocaea |
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Properties of the orbit ( animation ) | |
Orbit type | Main belt asteroid |
Asteroid family | Phocaea family |
Major semi-axis | 2.4 AU |
eccentricity | 0.256 |
Perihelion - aphelion | 1.785 AU - 3.015 AU |
Inclination of the orbit plane | 21.6 ° |
Length of the ascending node | 214.2 ° |
Argument of the periapsis | 90.3 ° |
Time of passage of the perihelion | February 5, 2010 |
Sidereal period of rotation | 3 a 261 d |
Mean orbital velocity | 18.9 km / s |
Physical Properties | |
Medium diameter | 61 km |
Albedo | 0.350 |
Rotation period | 9 h 56 min |
Absolute brightness | 7.8 likes |
Spectral class (according to Tholen) |
S. |
Spectral class (according to SMASSII) |
S. |
history | |
Explorer | Jean Chacornac |
Date of discovery | April 6, 1853 |
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. |
(25) Phocaea is an asteroid of the main belt , which on April 6, 1853 by Jean Chacornac was discovered. The name was adopted from the ancient Greek city of Phokaia .
Phocaea moves in an eccentric orbit around the Sun at a distance of 1.8 ( perihelion ) to 3.0 ( aphelion ) astronomical units in 3.72 years . At 21.6 ° , the orbit is very strongly inclined towards the ecliptic , the orbital eccentricity is 0.26.
Phocaea has a mean diameter of about 61 kilometers. It rotates around its own axis in around 10 hours. It has a relatively light, silicate-rich surface with an albedo of 0.350.