(11433) Gemmafrisius Main-belt Asteroid
Discovered on 16 October 1977 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar.
Gemma Frisius (Gemma Phrysius, Gemma Reyneri, 1508-1555) born in Dokkum, Friesland, studied in Leuven, Belgium, as a geographer, scientist and physician. He devised new globes, described how an accurate clock could be used to determine longitude and improved the astrolabe. Mercator was one of his students.Naming citation (20090409/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Gemmafrisius is today
Seen from above the solar system on 2026-10-14: Gemmafrisius is 2.81 au from the Sun and 1.81 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 11433 |
| Provisional designation | 3474 T-3 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.39 km (#14,251 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.185 |
| Absolute magnitude (H) | 14.62 |
| Orbital period | 3.76 years |
| Semi-major axis | 2.42 au |
| Perihelion – aphelion | 2.03 – 2.81 au |
| Eccentricity | 0.160 |
| Inclination | 3.21° |
| Closest distance between its orbit and Earth's (MOID) | 1.03 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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