Key Facts

  • Categorized as a Amor-class Asteroid
  • Comparable in size to a school bus or smaller
  • Will pass within 24,451,271 km of Earth in 2019
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation


2010 SZ3 is a very small asteroid whose orbit approaches the orbit of Earth but does not cross it. NASA JPL has classified 2010 SZ3 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.

2010 SZ3 orbits the sun every 471 days (1.29 years), coming as close as 1.02 AU and reaching as far as 1.35 AU from the sun. Based on its brightness and the way it reflects light, 2010 SZ3 is probably between 0.058 to 0.260 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.

Close Approaches

2010 SZ3's orbit is 0.01 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.

2010 SZ3 has 2 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Oct. 10, 2019 24,451,271 7.135
Oct. 12, 2073 28,767,933 7.928

Images and Observations

2010 SZ3's orbit is determined by observations dating back to Sept. 18, 2010. It was last officially observed on Oct. 12, 2010. The IAU Minor Planet Center records 22 observations used to determine its orbit.

Accessibility and Exploration

2010 SZ3 can be reached with a journey of 362 days. This trajectory would require a delta-v of 8.015 km/s. To put this into perspective, the delta-v to launch a rocket to Low-Earth Orbit is 9.7 km/s. There are 88,948 potential trajectories and launch windows to this asteroid.

See more at the NHATS Mission Trajectories table for 2010 SZ3.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of 2010 SZ3:



   or view a random object

Orbital Elements

  • Epoch: 2459000.5 JD
  • Semi-major axis: 1.185 AU
  • Eccentricity: 0.1418
  • Inclination: 2.21°
  • Longitude of Ascending Node: 179.84°
  • Argument of Periapsis: 163.49°
  • Mean Anomaly: 196.45°

Physical Characteristics

  • Diameter: ~0.159 km
  • Magnitude: 27.4

Derived Characteristics

  • Orbit Period: 471 days (1.29 years)
  • Avg. Orbit Speed: 27.37 km/s
  • Aphelion Distance: 1.35 AU
  • Perihelion Distance: 1.02 AU

Size Comparison

Orbit Simulation

Sky Map

The position of 2010 SZ3 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.