138628 (2000 QM251) is a large asteroid whose orbit extends beyond the orbit of Neptune. NASA JPL has not classified 2000 QM251 as potentially hazardous because its orbit does not bring it close to Earth.
2000 QM251 orbits the sun every 111,000 days (303.90 years), coming as close as 32.99 AU and reaching as far as 57.31 AU from the sun. Based on its brightness and the way it reflects light, 2000 QM251 is probably between 84.053 to 187.949 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the U.S. state of Delaware.
2000 QM251's orbit is 32.00 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.
2000 QM251's orbit is determined by observations dating back to Aug. 25, 2000. It was last officially observed on Sept. 14, 2018. The IAU Minor Planet Center records 32 observations used to determine its orbit.
The position of 138628 (2000 QM251) 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.