(65859) Madler Outer Main-belt Asteroid
Discovered on 9 April 1997 by E. W. Elst at La Silla.
German astronomer Johann Heinrich von Mädler (1794-1874) succeeded Struve as director of the Dorpat (Tartu) Observatory in 1840. Known with Fraunhofer for the first exact map of the moon Mappa selenographica (four volumes, 1834-1836), he continued Struve's program of observations of double stars.Naming citation (20080321/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Madler is today
Seen from above the solar system on 2026-10-14: Madler is 3.65 au from the Sun and 3.40 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 65859 |
| Provisional designation | 1997 GF42 |
| Orbit class | Outer Main-belt Asteroid |
| Diameter | 14.2 km (#3,333 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0460 |
| Absolute magnitude (H) | 13.46 |
| Orbital period | 7.91 years |
| Semi-major axis | 3.97 au |
| Perihelion – aphelion | 3.36 – 4.58 au |
| Eccentricity | 0.154 |
| Inclination | 5.46° |
| Closest distance between its orbit and Earth's (MOID) | 2.37 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Johann
- (1651) Behrens
- (5195) Kaendler
- (6734) Benzenberg
- (7449) Dollen
- (8158) Herder
- (8203) Jogolehmann
- (8368) Lamont
- (8583) Froberger
- (9052) Uhland
- (9134) Encke
- (10749) Musaus
- (11673) Baur
All asteroids named after someone called Johann