Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to a football field
  • Will pass within 2,854,173 km of Earth in 2024
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation


2008 OS7 is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2008 OS7 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

2008 OS7 orbits the sun every 962 days (2.63 years), coming as close as 0.67 AU and reaching as far as 3.14 AU from the sun. Based on its brightness and the way it reflects light, 2008 OS7 is probably between 0.221 to 0.494 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a football field.

Close Approaches

2008 OS7's orbit is 0.01 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.

2008 OS7 has 9 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Feb. 2, 2024 2,854,173 18.167
July 20, 2037 15,649,142 21.094
Jan. 30, 2061 4,805,355 19.439
July 16, 2074 7,206,156 18.682
Feb. 17, 2090 25,622,466 13.875
Jan. 28, 2127 13,523,299 21.354
July 27, 2161 25,239,839 23.339
Feb. 10, 2177 15,633,302 15.692
July 19, 2190 5,802,438 18.908

Images and Observations

2008 OS7's orbit is determined by observations dating back to July 30, 2008. It was last officially observed on July 29, 2016. The IAU Minor Planet Center records 140 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 OS7:



   or view a random object

Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.908 AU
  • Eccentricity: 0.6464
  • Inclination: 7.03°
  • Longitude of Ascending Node: 136.83°
  • Argument of Periapsis: 73.42°
  • Mean Anomaly: 289.77°

Physical Characteristics

  • Diameter: ~0.285 km
  • Magnitude: 20.4

Derived Characteristics

  • Orbit Period: 962 days (2.63 years)
  • Avg. Orbit Speed: 21.58 km/s
  • Aphelion Distance: 3.14 AU
  • Perihelion Distance: 0.67 AU

Map Comparison

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Orbit Simulation

Sky Map

The position of 2008 OS7 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.

Size Rendering

The below comparison is an artistic rendering that uses available data on the diameter of 2008 OS7 to create an approximate landscape rendering with New York City in the background. This approximation is built for full-resolution desktop browsers. Shape, color, and texture of asteroid are imagined.