(10781) Ritter Main-belt Asteroid
Discovered on 6 August 1991 by F. Borngen at Tautenburg.
As the result of numerous physical experiments he conducted during the decade he lived in Jena, the German scientist Johann Wilhelm Ritter (1776-1810) discovered the electrochemical voltage ranking of the metals (1798) and the ultraviolet part of the radiation in the solar spectrum (1801).Naming citation (20000320/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
👶 Ritter as a baby name🐶 Ritter as a dog name
Where Ritter is today
Seen from above the solar system on 2026-10-14: Ritter is 2.49 au from the Sun and 1.65 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 10781 |
| Provisional designation | 1991 PV31 |
| Orbit class | Main-belt Asteroid |
| Diameter | 8.56 km (#6,105 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0730 |
| Rotation period | 17.9 hours |
| Absolute magnitude (H) | 14.24 |
| Orbital period | 4.29 years |
| Semi-major axis | 2.64 au |
| Perihelion – aphelion | 2.32 – 2.96 au |
| Eccentricity | 0.121 |
| Inclination | 5.48° |
| Closest distance between its orbit and Earth's (MOID) | 1.31 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 6 August 1991
- (5447) Lallement
- (6404) Vanavara
- (7062) Meslier
- (8279) Cuzco
- (8672) Morse
- (8857) Cercidiphyllum
- (8858) Cornus
- (9342) Carygrant
- (9860) Archaeopteryx
- (12298) Brecht
- (13064) Haemhouts
- (15278) Paquet