525816 (2005 SF278) is a large asteroid whose orbit extends beyond the orbit of Neptune. NASA JPL has not classified 2005 SF278 as potentially hazardous because its orbit does not bring it close to Earth.
2005 SF278 orbits the sun every 107,000 days (292.95 years), coming as close as 35.54 AU and reaching as far as 52.68 AU from the sun. Based on its brightness and the way it reflects light, 2005 SF278 is probably between 120.380 to 269.178 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the U.S. state of Vermont.
2005 SF278's orbit is 34.60 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.
2005 SF278's orbit is determined by observations dating back to Sept. 22, 2004. It was last officially observed on Jan. 13, 2023. The IAU Minor Planet Center records 318 observations used to determine its orbit.
The position of 525816 (2005 SF278) 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.