Dionysus is a mid-sized asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified Dionysus as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.
Dionysus orbits the sun every 1,190 days (3.26 years), coming as close as 1.01 AU and reaching as far as 3.39 AU from the sun. Dionysus is about 1.5 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the U.S. Pentagon.
The rotation of Dionysus has been observed. It completes a rotation on its axis every 2.71 days.
Dionysus's orbit is 0.02 AU from Earth's orbit at its closest point. This means that there is an wide berth between this asteroid and Earth at all times.
Dionysus has 4 close approaches predicted in the coming decades:
|Date||Distance from Earth (km)||Velocity (km/s)|
|May 29, 2072||21,996,170||14.504|
|June 18, 2085||4,188,382||11.042|
|June 23, 2147||7,027,988||10.684|
|July 22, 2196||24,910,645||10.817|
Dionysus's orbit is determined by observations dating back to May 27, 1984. It was last officially observed on Jan. 30, 2019. The IAU Minor Planet Center records 555 observations used to determine its orbit.
The position of Dionysus 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.