(9903) Leonhardt

Asteroid (9903) Leonhardt

The orbit of (9903) Leonhardt
Properties of the orbit ( animation ) Epoch: April 27, 2019 ( JD 2,458,600.5)
Orbit type	Main outer belt asteroid
Major semi-axis	3.0848 AU
eccentricity	0.2359
Perihelion - aphelion	2.3570 AU - 3.8126 AU
Inclination of the orbit plane	1.6921 °
Length of the ascending node	195.9531 °
Argument of the periapsis	139.3017 °
Time of passage of the perihelion	June 27, 2019
Sidereal period	5.42 a
Mean orbital velocity	16.99 km / s
Physical Properties
Medium diameter	8.499 (± 0.240) km
Albedo	0.042 (± 0.008)
Absolute brightness	14.4 mag
history
Explorer	Paul G. Comba
Date of discovery	4th July 1997
Another name	1997 NA ₁ , 1976 UG ₆
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.

(9903) Leonhardt is a main outer belt asteroid discovered by Italian-American astronomer Paul G. Comba on July 4, 1997 at the Prescott Observatory in Prescott , Arizona ( IAU code 684). An unconfirmed sighting (1976 UG ₆ ) of the asteroid had already taken place on October 22nd and 24th, 1976 at the Japanese Kiso observatory .

The mean diameter of the asteroid was calculated to be 8.499 (± 0.240) km , with an albedo of 0.042 (± 0.008) it has a dark surface.

(9903) Leonhardt was named on April 2, 1999 after the Dutch harpsichordist , conductor and university professor Gustav Leonhardt . On May 14, 2014 another asteroid was named after Leonhardt: (12637) Gustavleonhardt .

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