5428 (1987 RA1) is a mid-sized asteroid orbiting between Mars and Jupiter in the main portion of the asteroid belt. NASA JPL has not classified 1987 RA1 as potentially hazardous because its orbit does not bring it close to Earth.
1987 RA1 orbits the sun every 1,810 days (4.96 years), coming as close as 2.79 AU and reaching as far as 3.02 AU from the sun. Based on its brightness and the way it reflects light, 1987 RA1 is probably between 7.056 to 15.778 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the San Francisco Bay.
The rotation of 1987 RA1 has been observed. It completes a rotation on its axis every 49.65 hours.
1987 RA1's orbit is 1.77 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.
1987 RA1's orbit is determined by observations dating back to Dec. 22, 1954. It was last officially observed on Feb. 19, 2023. The IAU Minor Planet Center records 2,736 observations used to determine its orbit.
The position of 5428 (1987 RA1) 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.