5645 (1990 SP) is a mid-sized asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 1990 SP 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.
1990 SP orbits the sun every 576 days (1.58 years), coming as close as 0.83 AU and reaching as far as 1.88 AU from the sun. 1990 SP is about 1.7 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to Mount Everest.
The rotation of 1990 SP has been observed. It completes a rotation on its axis every 30.39 days.
1990 SP's orbit is 0.05 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.
1990 SP has 10 close approaches predicted in the coming decades:
|Date||Distance from Earth (km)||Velocity (km/s)|
|Oct. 17, 2020||21,251,225||14.982|
|Nov. 10, 2031||14,735,169||10.520|
|Oct. 21, 2061||15,834,983||13.981|
|Nov. 18, 2072||19,934,212||10.188|
|Oct. 24, 2102||12,257,757||13.308|
|Nov. 21, 2113||20,849,341||10.153|
|Oct. 22, 2143||16,592,452||14.174|
|Nov. 15, 2154||16,840,694||10.299|
|Oct. 19, 2184||20,725,782||14.964|
|Nov. 11, 2195||13,870,551||10.526|
1990 SP's orbit is determined by observations dating back to Aug. 13, 1974. It was last officially observed on July 2, 2020. The IAU Minor Planet Center records 540 observations used to determine its orbit.
The position of 5645 (1990 SP) 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.