21030 (1989 TZ11) is a mid-sized asteroid with an orbit that crosses the orbit of Mars. NASA JPL has not classified 1989 TZ11 as potentially hazardous because its orbit does not bring it close to Earth.
1989 TZ11 orbits the sun every 1,320 days (3.61 years), coming as close as 1.50 AU and reaching as far as 3.21 AU from the sun. Based on its brightness and the way it reflects light, 1989 TZ11 is probably between 2.574 to 5.755 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the island of Manhattan.
The rotation of 1989 TZ11 has been observed. It completes a rotation on its axis every 4.09 hours.
1989 TZ11's orbit is 0.53 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.
1989 TZ11's orbit is determined by observations dating back to July 29, 1978. It was last officially observed on April 12, 2023. The IAU Minor Planet Center records 1,563 observations used to determine its orbit.
The position of 21030 (1989 TZ11) 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 1989 TZ11 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.