(12923) Zephyr Apollo
Discovered on 11 April 1999 by LONEOS at Anderson Mesa.
The word zephyr derives from the name of the ancient Greek god of the west wind, Zephyros. The name was suggested by M. Smitherman.Naming citation (20040928/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
👶 Zephyr as a baby name🐶 Zephyr as a dog name🐱 Zephyr as a cat name
Where Zephyr is today
Seen from above the solar system on 2026-10-14: Zephyr is 1.71 au from the Sun and 2.70 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 12923 |
| Provisional designation | 1999 GK4 |
| Orbit class | Apollo · near-Earth · potentially hazardous |
| Diameter | 2.06 km (#16,978 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.199 |
| Rotation period | 3.89 hours |
| Spectral type | S: |
| Absolute magnitude (H) | 15.8 |
| Orbital period | 2.75 years |
| Semi-major axis | 1.96 au |
| Perihelion – aphelion | 0.994 – 2.93 au |
| Eccentricity | 0.493 |
| Inclination | 5.31° |
| Closest distance between its orbit and Earth's (MOID) | 0.0196 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 11 April 1999
- (22783) Teng
- (29895) Sarafaggi
- (31647) Beauwigman
- (31648) Pedrosada
- (33490) Roggemans
- (33491) Tonyroman
- (33525) Teresinha
- (85970) Fundacaoterra