Nemesis is a large asteroid orbiting between Mars and Jupiter in the main portion of the asteroid belt. NASA JPL has not classified Nemesis as potentially hazardous because its orbit does not bring it close to Earth.
Nemesis orbits the sun every 1,660 days (4.54 years), coming as close as 2.40 AU and reaching as far as 3.10 AU from the sun. Nemesis is about 162.5 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the U.S. state of Vermont.
The rotation of Nemesis has been observed. It completes a rotation on its axis every 38.93 hours.
Nemesis's spectral type C (Tholen) / C (SMASSII) indicates that it is likely to contain water, iron, nickel, cobalt, nitrogen, and ammonia.
Nemesis's orbit is 1.41 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.
Nemesis's orbit is determined by observations dating back to Nov. 26, 1872. It was last officially observed on Feb. 19, 2023. The IAU Minor Planet Center records 4,475 observations used to determine its orbit.
The position of Nemesis 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.