(5494) Johanmohr Main-belt Asteroid
Discovered on 19 October 1933 by K. Reinmuth at Heidelberg.
German-Dutch astronomer Johan Maurits Mohr (1716-1775) made several successful meteorological and astronomical observations from his private observatory on the Molenvliet, Batavia, Dutch East Indies. The observations included some of the transits of Venus in 1761 and 1769.Naming citation (20070926/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Johanmohr is today
Seen from above the solar system on 2026-10-14: Johanmohr is 2.95 au from the Sun and 3.61 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 5494 |
| Provisional designation | 1933 UM1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 8.90 km (#5,831 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.245 |
| Rotation period | 5.73 hours |
| Absolute magnitude (H) | 12.79 |
| Orbital period | 4.82 years |
| Semi-major axis | 2.85 au |
| Perihelion – aphelion | 2.63 – 3.08 au |
| Eccentricity | 0.0791 |
| Inclination | 1.14° |
| Closest distance between its orbit and Earth's (MOID) | 1.63 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Johan
- (5274) Degewij
- (7857) Lagerros
- (9693) Bleeker
- (9911) Quantz
- (11797) Warell
- (11846) Verminnen
- (12857) Johandemessie
- (13350) Gmelin
- (24503) Kero
- (25108) Bostrom
- (79410) Wallerius
- (483637) Johanstein
All asteroids named after someone called Johan