13399 (1999 RJ88) is a large asteroid orbiting between Mars and Jupiter in the main portion of the asteroid belt. NASA JPL has not classified 1999 RJ88 as potentially hazardous because its orbit does not bring it close to Earth.
1999 RJ88 orbits the sun every 1,920 days (5.26 years), coming as close as 2.73 AU and reaching as far as 3.32 AU from the sun. 1999 RJ88 is about 10.2 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the city of Boston.
1999 RJ88's orbit is 1.72 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.
1999 RJ88's orbit is determined by observations dating back to May 15, 1982. It was last officially observed on May 21, 2023. The IAU Minor Planet Center records 3,149 observations used to determine its orbit.
The position of 13399 (1999 RJ88) 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.