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Toro (minor planet 1685)





A member of the Apollo group of Earth-crossing asteroids, discovered by Carl Wirtanen in 1948 and rediscovered in 1964, whose closest approach takes it within 0.13 AU of Earth. Radar observations indicate a rocky surface, thinly covered with dust.


diameter 5 × 3 km
albedo 0.15
rotational period 10.18 hours
semimajor axis 1.37 AU
perihelion 0.77 AU
aphelion 1.96 AU
eccentricity 0.44
period 584.2 days (8/5 that of Earth)


Related category

   • NOTABLE ASTEROIDS, CENTAURS, AND KUIPER BELT OBJECTS