617103 (2003 FM129) is a large asteroid whose orbit extends beyond the orbit of Neptune. NASA JPL has not classified 2003 FM129 as potentially hazardous because its orbit does not bring it close to Earth.
2003 FM129 orbits the sun every 130,000 days (355.92 years), coming as close as 36.51 AU and reaching as far as 64.15 AU from the sun. Based on its brightness and the way it reflects light, 2003 FM129 is probably between 138.853 to 310.485 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the U.S. state of Maryland.
2003 FM129's orbit is 35.50 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.
2003 FM129's orbit is determined by observations dating back to March 31, 2003. It was last officially observed on June 21, 2023. The IAU Minor Planet Center records 167 observations used to determine its orbit.
The position of 617103 (2003 FM129) 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.