|Near infrared images of Hebe with the SPHERE instrument of the Very Large Telescope .|
|Properties of the orbit ( animation )|
|Orbit type||Main belt asteroid|
|Major semi-axis||2.425 AU|
|Perihelion - aphelion||1.933 AU - 2.917 AU|
|Inclination of the orbit plane||14.7 °|
|Length of the ascending node||138.6 °|
|Argument of the periapsis||239.9 °|
|Time of passage of the perihelion||May 31, 2018|
|Sidereal period of rotation||3 a 283 d|
|Mean orbital velocity||18.94 km / s|
|Medium diameter||195 km|
|Dimensions||1.4 x 10 19kg|
|Medium density||1.7 g / cm³|
|Rotation period||7.3 h|
|Absolute brightness||5.7 likes|
(according to Tholen)
(according to SMASSII)
|Date of discovery||July 1, 1847|
|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.|
(6) Hebe is an asteroid of the main asteroid belt , which was discovered on July 1, 1847 by the amateur astronomer Karl Ludwig Hencke as the sixth asteroid.
The heavenly body was named after Hebe , the Greek goddess of youth.
Hebe moves at a distance of approx. 1.9 ( perihelion ) to 2.9 ( aphelion ) astronomical units , in approx. 3.8 years on an eccentric orbit around the sun . The orbit is inclined about 15 ° to the ecliptic , the orbit eccentricity is 0.20.
With a diameter of approx. 195 km, Hebe is one of the largest asteroids in the main belt. It has a relatively light, silicate-rich surface with an albedo of 0.27. During opposition , Hebe achieved a brightness of 9.2 mag . To find them, however, you need a telescope or powerful prism binoculars .
On March 5, 1977, there was an eclipse of a 3rd magnitude star. Paul D. Maley observed an alleged companion who was initially called Jebe. However, it could not be confirmed later, the first known moon of an asteroid became Dactyl at (243) Ida sixteen years later .
- ↑ G. Michalak: Determination of asteroid masses: II. (6) Hebe, (10) Hygiea, (15) Eunomia, (52) Europa, (88) Thisbe, (444) Gyptis, (511) Davida and (704) Interamnia . In: Astronomy & Astrophysics . 374, No. 2, August 15, 2001, pp. 703-711. bibcode : 2001A & A ... 374..703M . doi : 10.1051 / 0004-6361: 20010731 .
- ^ Wm. Robert Johnston: Other Reports of Asteroid / TNO Companions - September 26, 2006.