2011 SW281 is a large asteroid whose orbit extends beyond the orbit of Neptune. NASA JPL has not classified 2011 SW281 as potentially hazardous because its orbit does not bring it close to Earth.
2011 SW281 orbits the sun every 118,000 days (323.07 years), coming as close as 42.28 AU and reaching as far as 51.94 AU from the sun. Based on its brightness and the way it reflects light, 2011 SW281 is probably between 136.948 to 306.225 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the U.S. state of Massachusetts.
2011 SW281's orbit is 41.30 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.
2011 SW281's orbit is determined by observations dating back to Sept. 15, 2009. It was last officially observed on Oct. 18, 2018. The IAU Minor Planet Center records 152 observations used to determine its orbit.
The position of 2011 SW281 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.