66187 (1998 XS73) is a large asteroid that orbits between Mars and Jupiter in the outer reaches of the main asteroid belt. NASA JPL has not classified 1998 XS73 as potentially hazardous because its orbit does not bring it close to Earth.
1998 XS73 orbits the sun every 2,910 days (7.97 years), coming as close as 3.34 AU and reaching as far as 4.63 AU from the sun. 1998 XS73 is about 21.7 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the city of Indianapolis.
The rotation of 1998 XS73 has been observed. It completes a rotation on its axis every 31.03 hours.
1998 XS73's orbit is 2.35 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.
1998 XS73's orbit is determined by observations dating back to Dec. 9, 1990. It was last officially observed on May 13, 2023. The IAU Minor Planet Center records 2,431 observations used to determine its orbit.
The position of 66187 (1998 XS73) 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.