(7449) Dollen Main-belt Asteroid
Discovered on 21 August 1949 by K. Reinmuth at Heidelberg.
Johann Heinrich Wilhelm Döllen (1820-1897), an astronomer at the Dorpat Observatory, was an assistant of W. Struve. Later he worked on geodetic problems at the Pulkovo Observatory. Döllen is notable for his discussion on errors of heliometer observations. The name was suggested by L. D. Schmadel.Naming citation (20090806/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Dollen is today
Seen from above the solar system on 2026-10-14: Dollen is 2.23 au from the Sun and 2.36 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 7449 |
| Provisional designation | 1949 QL |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.39 km (#14,253 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.465 |
| Rotation period | 10.0 hours |
| Absolute magnitude (H) | 14.57 |
| Orbital period | 3.31 years |
| Semi-major axis | 2.22 au |
| Perihelion – aphelion | 1.79 – 2.66 au |
| Eccentricity | 0.196 |
| Inclination | 6.26° |
| Closest distance between its orbit and Earth's (MOID) | 0.784 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Johann
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- (5195) Kaendler
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- (8158) Herder
- (8203) Jogolehmann
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- (8583) Froberger
- (9052) Uhland
- (9134) Encke
- (10749) Musaus
- (11673) Baur
- (11847) Winckelmann
All asteroids named after someone called Johann