143685 (2003 SS317) is a large asteroid whose orbit extends beyond the orbit of Neptune. NASA JPL has not classified 2003 SS317 as potentially hazardous because its orbit does not bring it close to Earth.
2003 SS317 orbits the sun every 81,600 days (223.41 years), coming as close as 27.89 AU and reaching as far as 45.75 AU from the sun. Based on its brightness and the way it reflects light, 2003 SS317 is probably between 61.738 to 138.051 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the U.S. state of Delaware.
2003 SS317's orbit is 26.90 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.
2003 SS317's orbit is determined by observations dating back to Sept. 25, 2003. It was last officially observed on Oct. 18, 2022. The IAU Minor Planet Center records 329 observations used to determine its orbit.
The position of 143685 (2003 SS317) 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.