(75423) Gladyswest Main-belt Asteroid
Discovered on 5 December 1999 by CSS at Catalina.
Gladys West (b. 1930) is an American mathematician whose work in satellite geodesy was instrumental in the development of the Global Positioning System. Her mathematical modeling of the shape of the Earth enabled the accurate calculation of satellite orbits, revolutionizing navigation technology.Naming citation (WGSBN Bull. 5, #19, 8), IAU / Minor Planet Center, via NASA/JPL
Where Gladyswest is today
Seen from above the solar system on 2026-10-14: Gladyswest is 2.59 au from the Sun and 3.46 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 75423 |
| Provisional designation | 1999 XO119 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.17 km (#16,821 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.376 |
| Rotation period | 2.55 hours |
| Absolute magnitude (H) | 15.28 |
| Orbital period | 3.69 years |
| Semi-major axis | 2.39 au |
| Perihelion – aphelion | 2.12 – 2.66 au |
| Eccentricity | 0.113 |
| Inclination | 6.74° |
| Closest distance between its orbit and Earth's (MOID) | 1.12 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Gladys
All asteroids named after someone called Gladys
Also discovered on 5 December 1999
- (13858) Ericchristensen
- (14232) Curtismiller
- (14682) Davidhirsch
- (16112) Vitaris
- (20711) Seijisugita
- (20712) Shashiganesh
- (20725) Juliuscsotonyi
- (21989) Werntz
- (22022) Gould
- (22025) Dorisdaou
- (22026) Lindabillings
- (22027) Romanakofler