Thereus is a relatively small asteroid with an orbit between Jupiter and Neptune. NASA JPL has not classified Thereus as potentially hazardous because its orbit does not bring it close to Earth.
Thereus orbits the sun every 12,643 days (34.61 years), coming as close as 8.50 AU and reaching as far as 12.74 AU from the sun. Thereus is about 86.5 kilometers in diameter, making it larger than most asteroids, comparable in size to the U.S. state of Delaware.
The rotation of Thereus has been observed. It completes a rotation on its axis every 8.34 days.
Thereus's orbit is 7.55 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.
Thereus's orbit is determined by observations dating back to June 5, 1995. It was last officially observed on Jan. 7, 2018. The IAU Minor Planet Center records 433 observations used to determine its orbit.
The position of Thereus 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.