517717 (2015 KZ120) is a large asteroid whose orbit extends beyond the orbit of Neptune. NASA JPL has not classified 2015 KZ120 as potentially hazardous because its orbit does not bring it close to Earth.
2015 KZ120 orbits the sun every 116,000 days (317.59 years), coming as close as 8.37 AU and reaching as far as 84.91 AU from the sun. Its orbit is highly elliptical. Based on its brightness and the way it reflects light, 2015 KZ120 is probably between 24.806 to 55.468 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the city of New York.
2015 KZ120's orbit is 7.90 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.
2015 KZ120's orbit is determined by observations dating back to May 20, 2015. It was last officially observed on Nov. 3, 2020. The IAU Minor Planet Center records 353 observations used to determine its orbit.
The position of 517717 (2015 KZ120) 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.