(10984) Gispen Mars-crossing Asteroid
Discovered on 16 October 1977 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar.
Willem Hendrik Gispen (b. 1943) is a well-known Dutch scientist in the field of neurosciences, and from 2001 to 2007 he was rector of Utrecht University. He contributed to establishing the Sonnenborgh museum and observatory as a place for communication and education in astronomy and meteorology.Naming citation (20070730/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Gispen is today
Seen from above the solar system on 2026-10-14: Gispen is 2.88 au from the Sun and 2.94 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 10984 |
| Provisional designation | 3507 T-3 |
| Orbit class | Mars-crossing Asteroid |
| Diameter | 2.44 km (#16,375 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.373 |
| Absolute magnitude (H) | 14.83 |
| Orbital period | 3.19 years |
| Semi-major axis | 2.17 au |
| Perihelion – aphelion | 1.46 – 2.88 au |
| Eccentricity | 0.328 |
| Inclination | 5.88° |
| Closest distance between its orbit and Earth's (MOID) | 0.458 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Willem
- (1964) Luyten
- (9686) Keesom
- (10436) Janwillempel
- (10652) Blaeu
- (10654) Bontekoe
- (10964) Degraaff
- (11240) Piso
- (11427) Willemkolff
- (12132) Wimfroger
- (12162) Bilderdijk
- (12175) Wimhermans
- (13045) Vermandere
All asteroids named after someone called Willem
Also discovered on 16 October 1977
- (3798) de Jager
- (3936) Elst
- (4044) Erikhog
- (4108) Rakos
- (4722) Agelaos
- (4753) Phidias
- (4754) Panthoos
- (5610) Balster
- (5699) Munch
- (5700) Homerus
- (5984) Lysippus
- (6055) Brunelleschi