Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to a football field
  • Will pass within 14,001,330 km of Earth in 2019
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation


2008 SR1 is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2008 SR1 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

2008 SR1 orbits the sun every 1,330 days (3.64 years), coming as close as 0.83 AU and reaching as far as 3.91 AU from the sun. Based on its brightness and the way it reflects light, 2008 SR1 is probably between 0.232 to 0.518 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a football field.

Close Approaches

2008 SR1's orbit is 0.03 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.

2008 SR1 has 4 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Sept. 9, 2019 14,001,330 15.774
Sept. 28, 2081 29,669,074 23.108
Sept. 23, 2154 17,814,564 20.666
Sept. 9, 2165 11,132,580 16.228

Images and Observations

2008 SR1's orbit is determined by observations dating back to Sept. 23, 2008. It was last officially observed on Oct. 31, 2019. The IAU Minor Planet Center records 233 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 2008 SR1:



   or view a random object

Orbital Elements

  • Epoch: 2459000.5 JD
  • Semi-major axis: 2.372 AU
  • Eccentricity: 0.6505
  • Inclination: 16.88°
  • Longitude of Ascending Node: 178.04°
  • Argument of Periapsis: 116.78°
  • Mean Anomaly: 81.66°

Physical Characteristics

  • Diameter: ~0.299 km
  • Magnitude: 20.3

Derived Characteristics

  • Orbit Period: 1,330 days (3.64 years)
  • Avg. Orbit Speed: 19.40 km/s
  • Aphelion Distance: 3.91 AU
  • Perihelion Distance: 0.83 AU

Size Comparison

Orbit Simulation

Sky Map

The position of 2008 SR1 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.