102528 (1999 US3) is a large asteroid with an orbit that crosses the orbit of Mars. NASA JPL has not classified 1999 US3 as potentially hazardous because its orbit does not bring it close to Earth.
1999 US3 orbits the sun every 1,680 days (4.60 years), coming as close as 1.34 AU and reaching as far as 4.20 AU from the sun. 1999 US3 is about 12.9 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the city of Cleveland, Ohio.
The rotation of 1999 US3 has been observed. It completes a rotation on its axis every 4.68 hours.
1999 US3's orbit is 0.35 AU from Earth's orbit at its closest point. This means that there is a 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.
1999 US3's orbit is determined by observations dating back to July 11, 1994. It was last officially observed on June 21, 2023. The IAU Minor Planet Center records 2,414 observations used to determine its orbit.
The position of 102528 (1999 US3) 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.