Atira is a mid-sized asteroid with an orbit that is entirely confined within Earth's orbit. NASA JPL has classified Atira 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.
Atira orbits the sun every 233 days (0.64 years), coming as close as 0.50 AU and reaching as far as 0.98 AU from the sun. Based on its brightness and the way it reflects light, Atira is probably between 1.461 to 3.266 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to Mount Everest.
The rotation of Atira has been observed. It completes a rotation on its axis every 3.40 days.
Atira's orbit is 0.21 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.
Atira's orbit is determined by observations dating back to Feb. 11, 2003. It was last officially observed on April 14, 2019. The IAU Minor Planet Center records 478 observations used to determine its orbit.
The position of Atira 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.