Key Facts

  • Categorized as a Amor-class Asteroid
  • Comparable in size to a school bus or smaller
  • Will pass within 13,761,777 km of Earth in 2019
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation


477719 (2010 SG15) is a very small asteroid whose orbit approaches the orbit of Earth but does not cross it. NASA JPL has classified 2010 SG15 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 SG15 orbits the sun every 1,100 days (3.01 years), coming as close as 1.09 AU and reaching as far as 3.07 AU from the sun. Based on its brightness and the way it reflects light, 2010 SG15 is probably between 0.024 to 0.054 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.

Close Approaches

2010 SG15's orbit is 0.09 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 SG15 has 6 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Oct. 11, 2019 13,761,777 4.877
Oct. 9, 2022 13,825,533 4.999
Oct. 6, 2025 14,627,426 5.161
Sept. 30, 2028 17,180,577 5.968
Sept. 27, 2031 21,647,530 6.860
Sept. 21, 2034 28,858,504 8.644

Images and Observations

2010 SG15's orbit is determined by observations dating back to Sept. 29, 2010. It was last officially observed on Nov. 29, 2016. The IAU Minor Planet Center records 100 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 2010 SG15:



   or view a random object

Orbital Elements

  • Epoch: 2459000.5 JD
  • Semi-major axis: 2.08 AU
  • Eccentricity: 0.4763
  • Inclination: 0.83°
  • Longitude of Ascending Node: 182.29°
  • Argument of Periapsis: 199.52°
  • Mean Anomaly: 75.25°

Physical Characteristics

  • Diameter: ~0.031 km
  • Magnitude: 25.2

Derived Characteristics

  • Orbit Period: 1,100 days (3.01 years)
  • Avg. Orbit Speed: 20.57 km/s
  • Aphelion Distance: 3.07 AU
  • Perihelion Distance: 1.09 AU

Size Comparison

Orbit Simulation

Sky Map

The position of 477719 (2010 SG15) 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.