Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to a school bus or smaller
  • Will pass within 3,120,137 km of Earth in 2020
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

2020 SA1 is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2020 SA1 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.

2020 SA1 orbits the sun every 742 days (2.03 years), coming as close as 0.72 AU and reaching as far as 2.49 AU from the sun. Based on its brightness and the way it reflects light, 2020 SA1 is probably between 0.018 to 0.039 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.

Close Approaches

2020 SA1's orbit is 0.02 AU from Earth's orbit at its closest point. This means that there is a wide berth between this asteroid and Earth at all times.

2020 SA1 has 2 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Sept. 13, 2020 3,120,137 16.086
Sept. 24, 2022 28,418,792 21.790

Images and Observations

2020 SA1's orbit is determined by observations dating back to Sept. 17, 2020. It was last officially observed on Sept. 26, 2020. The IAU Minor Planet Center records 34 observations used to determine its orbit.

Accessibility and Exploration

This asteroid is not considered a viable target for human exploration by the NHATS study.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of 2020 SA1:

References

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Orbital Elements

  • Epoch: 2459110.5 JD
  • Semi-major axis: 1.604 AU
  • Eccentricity: 0.5536
  • Inclination: 6.92°
  • Longitude of Ascending Node: 0.1°
  • Argument of Periapsis: 271.56°
  • Mean Anomaly: 26.69°

Physical Characteristics

  • Diameter: ~0.023 km
  • Magnitude: 25.9

Derived Characteristics

  • Orbit Period: 742 days (2.03 years)
  • Avg. Orbit Speed: 23.52 km/s
  • Aphelion Distance: 2.49 AU
  • Perihelion Distance: 0.72 AU

Map Comparison

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Orbit Simulation

Sky Map

The position of 2020 SA1 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.