(475) Ocllo Mars-crossing Asteroid

Discovered on 14 August 1901 by D. Stewart at Arequipa.

Where Ocllo is today

Seen from above the solar system on 2026-10-14: Ocllo is 1.86 au from the Sun and 2.25 au from Earth. Computed from JPL's orbital elements.

Number	475
Provisional designation	A901 PA
Orbit class	Mars-crossing Asteroid
Diameter	17.8 km (#2,522 largest of 17,440 named asteroids with a measured size)
Albedo	0.0570
Rotation period	7.32 hours
Spectral type	X
Absolute magnitude (H)	11.53
Orbital period	4.18 years
Semi-major axis	2.59 au
Perihelion – aphelion	1.61 – 3.58 au
Eccentricity	0.379
Inclination	18.9°
Closest distance between its orbit and Earth's (MOID)	0.675 au