Williamina is a mid-sized asteroid orbiting between Mars and Jupiter in the main portion of the asteroid belt. NASA JPL has not classified Williamina as potentially hazardous because its orbit does not bring it close to Earth.
Williamina orbits the sun every 1,360 days (3.72 years), coming as close as 1.82 AU and reaching as far as 2.98 AU from the sun. Williamina is about 9.3 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the San Francisco Bay.
The rotation of Williamina has been observed. It completes a rotation on its axis every 196.45 hours.
Williamina's orbit is 0.84 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.
Williamina's orbit is determined by observations dating back to Jan. 19, 1972. It was last officially observed on July 5, 2023. The IAU Minor Planet Center records 3,230 observations used to determine its orbit.
The position of Williamina 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.