1685 Toro

1685 Toro is an Amor asteroid, meaning it is a near-Earth asteroid with an orbit that is primarily outside Earth's orbit but that crosses Mars' orbit. It was discovered on July 17, 1948, by Carl A. Wirtanen at the Lick Observatory on Mount Hamilton.

Toro is notable for being one of the first asteroids to be recognized as having a chaotic orbit. Its orbit is strongly influenced by close approaches to both Earth and Mars, leading to unpredictable long-term behavior. This makes predicting its future position with certainty beyond a few centuries very difficult.

The asteroid is relatively small, with a diameter estimated to be between 3 and 5 kilometers. Its rotation period is approximately 10.2 hours. Spectroscopic studies indicate that Toro is likely an S-type asteroid, meaning it is composed primarily of silicate materials with some metallic iron and nickel.

While 1685 Toro's orbit brings it close to Earth, it is not considered a particularly dangerous asteroid. The probability of a collision with Earth in the foreseeable future is low.