(259) Aletheia
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Asteroid (259) Aletheia |
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| Properties of the orbit ( animation ) | |
| Orbit type | Outer main belt |
| Major semi-axis | 3.139 AU |
| eccentricity | 0.125 |
| Perihelion - aphelion | 2.747 AU - 3.531 AU |
| Inclination of the orbit plane | 10.8 ° |
| Length of the ascending node | 86.9 ° |
| Argument of the periapsis | 168.8 ° |
| Time of passage of the perihelion | November 5, 2008 |
| Sidereal period | 5 a 205 d |
| Mean orbital velocity | 16.7 km / s |
| Physical Properties | |
| Medium diameter | (174.318 ± 1.054) km |
| Albedo | 0.043 |
| Rotation period | 8 h 9 min |
| Absolute brightness | 7.76 likes |
| Spectral class | CP |
| history | |
| Explorer | CHF Peters |
| Date of discovery | June 28, 1886 |
| Another name | 1947 LD |
| 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. | |
(259) Aletheia is an asteroid of the outer main asteroid belt , which was discovered on June 28, 1886 by Christian Heinrich Friedrich Peters at the Observatory of Clinton ( USA ).
The name Aletheia denotes a term from ancient Greek philosophy and denotes the truth that is present in all recognizable things.
Aletheia moves from 2.7561 ( perihelion ) to 3.5216 ( aphelion ) astronomical units around the sun in 5.56 years . The orbit is inclined 10.8181 ° to the ecliptic , the orbital eccentricity is 0.1219.
With a diameter of 178.6 kilometers, Aletheia is one of the larger asteroids in the main belt. It has a dark, carbon-rich surface with an albedo of 0.0436.