18045 (1999 RR100) is a large asteroid orbiting between Mars and Jupiter in the main portion of the asteroid belt. NASA JPL has not classified 1999 RR100 as potentially hazardous because its orbit does not bring it close to Earth.
1999 RR100 orbits the sun every 2,090 days (5.72 years), coming as close as 2.76 AU and reaching as far as 3.64 AU from the sun. 1999 RR100 is about 16.8 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the city of Philadelphia.
1999 RR100's orbit is 1.80 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 RR100's orbit is determined by observations dating back to Dec. 27, 1984. It was last officially observed on June 26, 2023. The IAU Minor Planet Center records 2,505 observations used to determine its orbit.
The position of 18045 (1999 RR100) 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.