Seneca is a small asteroid whose orbit approaches the orbit of Earth but does not cross it. NASA JPL has classified Seneca 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.
Seneca orbits the sun every 1,460 days (4.00 years), coming as close as 1.08 AU and reaching as far as 3.95 AU from the sun. Seneca is about 0.9 kilometers in diameter, making it small in absolute terms, but larger than ~97% of asteroids, comparable in size to the Golden Gate Bridge.
The rotation of Seneca has been observed. It completes a rotation on its axis every 8.00 days.
Seneca's orbit is 0.13 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.
Seneca has 1 close approaches predicted in the coming decades:
|Date||Distance from Earth (km)||Velocity (km/s)|
|March 14, 2179||14,719,317||13.254|
Seneca's orbit is determined by observations dating back to Feb. 17, 1978. It was last officially observed on Aug. 4, 2018. The IAU Minor Planet Center records 71 observations used to determine its orbit.
The position of Seneca 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.