Key Facts


87684 (2000 SY2) is a mid-sized asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 2000 SY2 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

2000 SY2 orbits the sun every 291 days (0.80 years), coming as close as 0.31 AU and reaching as far as 1.41 AU from the sun. Based on its brightness and the way it reflects light, 2000 SY2 is probably between 1.609 to 3.598 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to Mount Everest.

The rotation of 2000 SY2 has been observed. It completes a rotation on its axis every 2.57 hours.

No Close Approaches

2000 SY2's orbit is 0.05 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.

Orbital simulations conducted by NASA JPL's CNEOS do not show any close approaches to Earth.

Images and Observations

2000 SY2's orbit is determined by observations dating back to Oct. 7, 1977. It was last officially observed on Aug. 28, 2021. The IAU Minor Planet Center records 1,351 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 2000 SY2:



   or view a random object

Orbital Elements

  • Epoch: 2459396.5 JD
  • Semi-major axis: 0.8586 AU
  • Eccentricity: 0.6427
  • Inclination: 19.23°
  • Longitude of Ascending Node: 162.03°
  • Argument of Periapsis: 47.78°
  • Mean Anomaly: 131.55°

Physical Characteristics

  • Diameter: ~2.077 km
  • Magnitude: 16.09

Derived Characteristics

  • Orbit Period: 291 days (0.80 years)
  • Avg. Orbit Speed: 32.10 km/s
  • Aphelion Distance: 1.41 AU
  • Perihelion Distance: 0.31 AU
  • Rotation Period: 2.57 hours

Map Comparison

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Orbit Simulation

Sky Map

The position of 87684 (2000 SY2) 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 above comparison is an artistic rendering that uses available data on the diameter of 2000 SY2 to create an approximate landscape rendering with Mount Everest in the background. This approximation is built for full-resolution desktop browsers. Shape, color, and texture of asteroid are imagined.