(250) Bettina
Asteroid (250) Bettina |
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Properties of the orbit ( animation ) | |
Orbit type | Outer main belt |
Major semi-axis | 3.149 AU |
eccentricity | 0.132 |
Perihelion - aphelion | 2.732 AU - 3.566 AU |
Inclination of the orbit plane | 12.8 ° |
Length of the ascending node | 23.9 ° |
Argument of the periapsis | 76.7 ° |
Time of passage of the perihelion | September 12, 2015 |
Sidereal period | 5 a 214 d |
Mean orbital velocity | 16.7 km / s |
Physical Properties | |
Medium diameter | 121 km |
Albedo | 0.112 |
Rotation period | 5 h 3 min |
Absolute brightness | 7.58 mag |
Spectral class | M. |
history | |
Explorer | Johann Palisa |
Date of discovery | September 3, 1885 |
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. |
(250) Bettina is an asteroid of the outer main asteroid belt , which on 3 September 1885 by Johann Palisa at the observatory of Vienna was discovered. The asteroid was named after Bettina von Rothschild, the wife of Albert Salomon Anselm von Rothschild , who bought the naming rights for £ 50. Due to its spectral characteristics, Bettina is an M-type asteroid .
Orbit data
Bettina moves at a distance of 2.7325 ( perihelion ) to 3.5657 ( aphelion ) astronomical units around the sun in 5.59 years . The orbit is inclined 12.8194 ° to the ecliptic , the orbital eccentricity is 0.1323.
properties
Bettina has a mean diameter of around 121 kilometers and a light surface with an albedo of 0.112. Similar to many M-type asteroids, the reflection spectrum is flat and largely structureless. Bettina's light curve shows an irregular behavior with a rotation period of around 5 hours and 3 minutes and a brightness change of 0.17 ± 0.01 mag .
See also
Individual evidence
- ↑ Paul Murdin: Rock Legends: The Asteroids and Their Discoverers . Springer, 13 July 2016, ISBN 978-3-319-31836-3 , pp. 86–.
- ^ CI Lagerkvist, H. Rickman: The spin periods of M asteroids , Moon and the Planets 24: 437-440 (1981). bibcode : 1981M & P .... 24..437L
- ↑ P. Handersen et al .: The M- / X-asteroid menagerie: Results of an NIR spectral survey of 45 main-belt asteroids , Meteoritics and Planetary Science 46 (12): 1910-1938 (2011). doi : 10.1111 / j.1945-5100.2011.01304.x
- ^ E. Dotto et al .: M-type asteroids - Rotational properties of 16 objects , Astronomy and Astrophysics Supplement Series 95 (2): 195-211 (1992). bibcode : 1992A & AS ... 95..195D
- ↑ (250) Bettina in the Small-Body Database of the Jet Propulsion Laboratory (English).