(9903) Leonhardt Main-belt Asteroid
Discovered on 4 July 1997 by P. G. Comba at Prescott.
Named for Gustav Leonhardt (b. 1928), eminent Dutch harpsichordist, conductor and pedagogue. As a harpsichordist, he has made many concert tours of Europe and North America and recorded a large number of baroque works.Naming citation (19990402/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Leonhardt is today
Seen from above the solar system on 2026-10-14: Leonhardt is 3.59 au from the Sun and 3.86 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9903 |
| Provisional designation | 1997 NA1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 8.50 km (#6,149 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0420 |
| Absolute magnitude (H) | 14.52 |
| Orbital period | 5.43 years |
| Semi-major axis | 3.09 au |
| Perihelion – aphelion | 2.36 – 3.82 au |
| Eccentricity | 0.235 |
| Inclination | 1.69° |
| Closest distance between its orbit and Earth's (MOID) | 1.35 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Gustav
- (6516) Gruss
- (10122) Froding
- (10358) Kirchhoff
- (11019) Hansrott
- (11041) Fechner
- (12637) Gustavleonhardt
- (14980) Gustavbrom
- (15860) Siran
- (16445) Klimt
- (18872) Tammann
- (24967) Fristensky
- (38976) Taeve
All asteroids named after someone called Gustav