(532) Herculina
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Asteroid (532) Herculina |
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| Properties of the orbit ( animation ) | |
| Orbit type | Middle main belt |
| Major semi-axis | 2.772 AU |
| eccentricity | 0.178 |
| Perihelion - aphelion | 2.279 AU - 3.265 AU |
| Inclination of the orbit plane | 16.3 ° |
| Length of the ascending node | 107.6 ° |
| Argument of the periapsis | 76.5 ° |
| Time of passage of the perihelion | April 16, 2010 |
| Sidereal period | 4 a 224 d |
| Mean orbital velocity | 17.7 km / s |
| Physical Properties | |
| Medium diameter | 167.791 ± 0.890 km |
| Albedo | 0.1694 |
| Rotation period | 9 h 24 min |
| Absolute brightness | 5.81 likes |
| Spectral class | S. |
| history | |
| Explorer | Max Wolf |
| Date of discovery | April 20, 1904 |
| Another name | 1904 NY, 1950 JP |
| 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. | |
(532) Herculina is an asteroid of the main asteroid belt discovered on April 20, 1904 by the German astronomer Max Wolf in Heidelberg . The origin of the name is unknown.
Herculina moves at a distance of 2.277 ( perihelion ) to 3.265 ( aphelion ) astronomical units in around 4.62 years around the sun . The orbit is inclined 16.3084 ° to the ecliptic , the orbit eccentricity is 0.1778.
With a mean diameter of around 168 kilometers, Herculina is one of the largest asteroids in the main belt. It rotates around its own axis in 9.405 hours and the albedo of the surface is 0.16.
In 1978, astronomer David Dunham found evidence suggesting that Herculina might have a moon. However, recent studies with the Hubble Space Telescope could not support this assumption.
See also
Individual evidence
- ^ David W. Dunham: Satellite of Minor Planet 532 Herculina Discovered During Occultation . In: The Minor Planet Bulletin , Volume 6, December 1978, pp. 13-14
- ↑ Alex Weiss Storrs, Zellner, Burleson, Sichitiu, Wells, Kowal, Tholen: Imaging observations of asteroids with Hubble Space Telescope . In: Icarus , 137 (2), 1999, pp. 260–268, bibcode : 1999Icar..137..260S , doi: 10.1006 / icar.1999.6047 ( online ( memento from February 25, 2012 in the Internet Archive ) (PDF) )