San Juan is a mid-sized asteroid orbiting between Mars and Jupiter in the main portion of the asteroid belt. NASA JPL has not classified San Juan as potentially hazardous because its orbit does not bring it close to Earth.
San Juan orbits the sun every 1,290 days (3.53 years), coming as close as 2.21 AU and reaching as far as 2.44 AU from the sun. Based on its brightness and the way it reflects light, San Juan is probably between 7.666 to 17.141 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the city of Boston.
The rotation of San Juan has been observed. It completes a rotation on its axis every 9.18 hours.
San Juan's orbit is 1.21 AU from Earth's orbit at its closest point. This means that there is an extremely wide berth between this asteroid and Earth at all times.
Orbital simulations conducted by NASA JPL's CNEOS do not show any close approaches to Earth.
San Juan's orbit is determined by observations dating back to May 6, 1916. It was last officially observed on July 2, 2023. The IAU Minor Planet Center records 3,589 observations used to determine its orbit.
The position of San Juan is indicated by a ◯ pink circle. Note that the object may not be in your current field of view. Use the controls below to adjust position, location, and time.