|Properties of the orbit ( animation )|
|Orbit type||Main belt asteroid|
|Major semi-axis||2,619 AU|
|Perihelion - aphelion||2.078 AU - 3.16 AU|
|Inclination of the orbit plane||8.7 °|
|Length of the ascending node||333.5 °|
|Argument of the periapsis||152.8 °|
|Time of passage of the perihelion||May 2, 2011|
|Sidereal period||4 a 88 d|
|Mean orbital velocity||18.2 km / s|
|Medium diameter||120 km|
|Rotation period||7.3 h|
|Absolute brightness||8.1 likes|
|Date of discovery||March 15, 1863|
|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.|
(78) Diana is an asteroid of the main asteroid belt discovered on March 15, 1863 by Karl Theodor Robert Luther .
The heavenly body was named after Diana , the Roman goddess of the hunt.
Diana moves around the sun at a distance of 2.1 ( perihelion ) to 3.2 ( aphelion ) astronomical units in 4.2 years . The orbit is 8.7 ° inclined to the ecliptic , the orbital eccentricity is 0.21.
Diana has a diameter of 120 kilometers. It has a dark carbonaceous surface with a geometric albedo of 0.07. It rotates on its own axis in around 7.3 hours.