42811 (1999 JN81) is a mid-sized asteroid with an orbit that crosses the orbit of Mars. NASA JPL has not classified 1999 JN81 as potentially hazardous because its orbit does not bring it close to Earth.
1999 JN81 orbits the sun every 914 days (2.50 years), coming as close as 1.58 AU and reaching as far as 2.11 AU from the sun. 1999 JN81 is about 2.8 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to Mount Everest.
The rotation of 1999 JN81 has been observed. It completes a rotation on its axis every 3.90 hours.
1999 JN81's orbit is 0.63 AU from Earth's orbit at its closest point. This means that there is a very 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.
1999 JN81's orbit is determined by observations dating back to May 23, 1984. It was last officially observed on Feb. 3, 2023. The IAU Minor Planet Center records 3,248 observations used to determine its orbit.
The position of 42811 (1999 JN81) 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.
The above comparison is an artistic rendering that uses available data on the diameter of 1999 JN81 to create an approximate landscape rendering with Mount Everest in the background. This approximation is built for full-resolution desktop browsers. Shape, color, and texture of asteroid are imagined.