Boreas is a mid-sized asteroid whose orbit approaches the orbit of Earth but does not cross it. NASA JPL has classified Boreas as a "Near Earth Asteroid" due to its orbit's proximity to Earth, but it is not considered potentially hazardous because computer simulations have not indicated any imminent likelihood of future collision.
Boreas orbits the sun every 1,250 days (3.42 years), coming as close as 1.25 AU and reaching as far as 3.29 AU from the sun. Boreas is about 3.5 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the island of Manhattan.
The rotation of Boreas has been observed. It completes a rotation on its axis every 3.47 hours.
Boreas's orbit is 0.25 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.
Orbital simulations conducted by NASA JPL's CNEOS do not show any close approaches to Earth.
Boreas's orbit is determined by observations dating back to Sept. 1, 1953. It was last officially observed on Dec. 21, 2020. The IAU Minor Planet Center records 1,582 observations used to determine its orbit.
The position of Boreas 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 Boreas 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.