15505 (1999 RF56) is a large asteroid that orbits between Mars and Jupiter in the outer reaches of the main asteroid belt. NASA JPL has not classified 1999 RF56 as potentially hazardous because its orbit does not bring it close to Earth.
1999 RF56 orbits the sun every 2,870 days (7.86 years), coming as close as 3.49 AU and reaching as far as 4.41 AU from the sun. 1999 RF56 is about 24.8 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the city of Indianapolis.
The rotation of 1999 RF56 has been observed. It completes a rotation on its axis every 15.11 hours.
1999 RF56's orbit is 2.49 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 RF56's orbit is determined by observations dating back to April 6, 1989. It was last officially observed on June 15, 2023. The IAU Minor Planet Center records 2,939 observations used to determine its orbit.
The position of 15505 (1999 RF56) 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.