(23689) Jancuypers Main-belt Asteroid
Discovered on 3 May 1997 by E. W. Elst at La Silla.
Jan Cuypers (1956-2017) was an astronomer working at the Royal Observatory at Uccle. Involved in several public and astronomical duties at the observatory, he was very much appreciated by all his colleagues.Naming citation (MPC batch dated 2018-05-29), IAU / Minor Planet Center, via NASA/JPL
Where Jancuypers is today
Seen from above the solar system on 2026-10-14: Jancuypers is 3.03 au from the Sun and 3.89 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 23689 |
| Provisional designation | 1997 JC13 |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.71 km (#9,385 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.197 |
| Absolute magnitude (H) | 13.83 |
| Orbital period | 4.18 years |
| Semi-major axis | 2.60 au |
| Perihelion – aphelion | 2.16 – 3.03 au |
| Eccentricity | 0.169 |
| Inclination | 9.09° |
| Closest distance between its orbit and Earth's (MOID) | 1.17 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Jan
- (2308) Schilt
- (3791) Marci
- (3847) Sindel
- (6266) Letzel
- (6834) Hunfeld
- (7218) Skacel
- (7221) Sallaba
- (7701) Zrzavy
- (7849) Janjosefric
- (8149) Ruff
- (9239) van Riebeeck
- (9259) Janvanparadijs
All asteroids named after someone called Jan
Also discovered on 3 May 1997
- (9239) van Riebeeck
- (9446) Cicero
- (9447) Julesbordet
- (10612) Houffalize
- (11349) Witten
- (12052) Aretaon
- (12490) Leiden
- (12491) Musschenbroek
- (12492) Tanais
- (12845) Crick
- (13211) Stucky
- (13212) Jayleno