(1620) Geographos Apollo

Discovered on 14 September 1951 by Wilson, A. G., Minkowski, R. at Palomar.

Where Geographos is today

Seen from above the solar system on 2026-10-14: Geographos is 1.34 au from the Sun and 0.399 au from Earth. Computed from JPL's orbital elements.

Number	1620
Provisional designation	1951 RA
Orbit class	Apollo · near-Earth · potentially hazardous
Diameter	2.56 km (#16,143 largest of 17,440 named asteroids with a measured size)
Albedo	0.290
Rotation period	5.22 hours
Spectral type	S
Absolute magnitude (H)	15.27
Orbital period	1.39 years
Semi-major axis	1.25 au
Perihelion – aphelion	0.828 – 1.66 au
Eccentricity	0.336
Inclination	13.3°
Closest distance between its orbit and Earth's (MOID)	0.0295 au