Designation: 12923 ยท NASA Reference ID: 2012923
View on NASA JPL โ| Date | Miss Distance | Speed |
|---|---|---|
| September 22, 2032 | 0.1860 AU (27.8 million km) | 13.8 km/s |
| June 24, 2178 | 0.1959 AU (29.3 million km) | 13.0 km/s |
12923 Zephyr (1999 GK4) is classified as a Potentially Hazardous Asteroid (PHA) because it is estimated to be larger than 140 meters and its orbit comes within 0.05 AU of Earth. NASA continuously monitors this object for any future impact risk. Current data does not indicate a confirmed impact event.
Stony asteroid
12923 Zephyr (prov. designation: 1999 GK4) is a stony asteroid, classified as potentially hazardous asteroid and near-Earth object of the Apollo group, approximately 2 kilometers (1.2 miles) in diameter. It was discovered on 11 April 1999, by astronomers of the Lowell Observatory Near-Earth Object Search at Anderson Mesa Station near Flagstaff, Arizona. The asteroid was named after the deity Zephyrus from Greek mythology.
12923 Zephyr (1999 GK4) is classified as a potentially hazardous asteroid (PHA) by NASA. This means it is large enough and its orbit brings it close enough to Earth to warrant close monitoring. However, a PHA classification does not mean an impact is imminent.
The closest recorded Earth approach of 12923 Zephyr (1999 GK4) is 0.1860 AU (27.8 million km) on September 22, 2032, at a speed of approximately 13.8 km/s.
12923 Zephyr (1999 GK4) has an estimated diameter of 2.98 km (1839โ4112 meters range). Its absolute magnitude (H) is 15.8, which NASA uses along with assumed albedo to estimate size.