(9490) Gosemeijer Main-belt Asteroid
Discovered on 25 March 1971 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar.
Dutch amateur astronomer Henny Gosemeijer (1924-1999) founded the Public Observatory Twente in 1984. He himself made many observations of satellites and meteors, in addition to his activities in popularizing astronomy. He was honored by NASA and awarded the Dutch “van der Bilt” and “Simon Stevin” prizes.Naming citation (20000124/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Gosemeijer is today
Seen from above the solar system on 2026-10-14: Gosemeijer is 2.69 au from the Sun and 3.65 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9490 |
| Provisional designation | 1181 T-1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 7.60 km (#7,008 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.193 |
| Absolute magnitude (H) | 13.3 |
| Orbital period | 5.06 years |
| Semi-major axis | 2.95 au |
| Perihelion – aphelion | 2.68 – 3.21 au |
| Eccentricity | 0.0898 |
| Inclination | 3.58° |
| Closest distance between its orbit and Earth's (MOID) | 1.68 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Henny
All asteroids named after someone called Henny
Also discovered on 25 March 1971
- (1873) Agenor
- (5408) The
- (6072) Hooghoudt
- (6616) Plotinos
- (6617) Boethius
- (6673) Degas
- (6751) van Genderen
- (7148) Reinholdbien
- (7211) Xerxes
- (7314) Pevsner
- (7624) Gluck
- (7690) Sackler