(21804) Vaclavneumann Outer Main-belt Asteroid
Discovered on 4 October 1999 by L. Sarounova at Ondrejov.
Václav Neumann (1920-1995) was the head conductor of the Czech Philharmonic Orchestra during 1968-1990. He became famous especially for his interpretation of the work of Martinů, Mahler, Janáček and Dvořák.Naming citation (20020526/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Vaclavneumann is today
Seen from above the solar system on 2026-10-14: Vaclavneumann is 4.98 au from the Sun and 5.91 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21804 |
| Provisional designation | 1999 TC8 |
| Orbit class | Outer Main-belt Asteroid |
| Diameter | 9.59 km (#5,363 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0400 |
| Absolute magnitude (H) | 14.44 |
| Orbital period | 7.78 years |
| Semi-major axis | 3.93 au |
| Perihelion – aphelion | 2.87 – 4.98 au |
| Eccentricity | 0.269 |
| Inclination | 3.84° |
| Closest distance between its orbit and Earth's (MOID) | 1.87 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 4 October 1999
- (13407) Ikukomakino
- (15093) Lestermackey
- (15509) Annejing
- (15510) Phoeberounds
- (16088) Jessgoldstein
- (17179) Codina
- (20626) Rider-Stokes
- (20638) Lingchen
- (20639) Michellouie
- (20641) Yenuanchen
- (20642) Laurajohnson
- (21815) Fanyang