(13530) Ninnemann Main-belt Asteroid
Discovered on 9 September 1991 by Schmadel, L. D., Borngen, F. at Tautenburg.
Olaf Ninnemann (b. 1947), German mathematician and leading expert in the field of information and documentation, is especially interested in number theory. He played a key role in the establishment of the Zentralblatt für Mathematik and has been its executive editor since 1978.Naming citation (20000523/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Ninnemann is today
Seen from above the solar system on 2026-10-14: Ninnemann is 2.29 au from the Sun and 1.33 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 13530 |
| Provisional designation | 1991 RS2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.79 km (#11,032 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.280 |
| Rotation period | 4.72 hours |
| Absolute magnitude (H) | 13.88 |
| Orbital period | 3.50 years |
| Semi-major axis | 2.31 au |
| Perihelion – aphelion | 2.16 – 2.45 au |
| Eccentricity | 0.0640 |
| Inclination | 6.48° |
| Closest distance between its orbit and Earth's (MOID) | 1.18 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Olaf
All asteroids named after someone called Olaf
Also discovered on 9 September 1991
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- (6043) Aurochs
- (6157) Prey
- (7127) Stifter
- (9861) Jahreiss
- (10095) Carlloewe
- (14412) Wolflojewski
- (16544) Hochlehnert
- (19178) Walterbothe
- (29208) Halorentz
- (32821) Posch
- (42487) Angstrom