Key Facts

  • Categorized as a Aten-class Asteroid
  • Comparable in size to Mount Everest
  • Will pass within 21,807,584 km of Earth in 2027
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

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 1.602 to 3.581 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 2.87 days.

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.

2000 SY2 has 16 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Sept. 17, 2027 21,807,584 25.444
Sept. 13, 2031 7,543,823 21.913
Sept. 10, 2035 15,662,301 18.889
Sept. 15, 2066 17,120,005 24.417
Sept. 12, 2070 7,307,468 21.112
Sept. 10, 2074 19,604,109 18.182
Sept. 19, 2101 29,041,248 27.005
Sept. 15, 2105 12,653,654 23.391
Sept. 12, 2109 9,865,197 20.156
Sept. 11, 2113 24,803,871 17.388
Sept. 17, 2140 22,229,514 25.532
Sept. 13, 2144 8,185,322 22.015
Sept. 11, 2148 15,320,095 18.994
Sept. 17, 2179 17,759,027 24.519
Sept. 14, 2183 7,750,328 21.148
Sept. 12, 2187 19,898,286 18.177

Images and Observations

2000 SY2's orbit is determined by observations dating back to Oct. 7, 1977. It was last officially observed on Jan. 24, 2020. The IAU Minor Planet Center records 754 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:

References

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Orbital Elements

  • Epoch: 2459000.5 JD
  • Semi-major axis: 0.8587 AU
  • Eccentricity: 0.6427
  • Inclination: 19.23°
  • Longitude of Ascending Node: 162.04°
  • Argument of Periapsis: 47.78°
  • Mean Anomaly: 0.97°

Physical Characteristics

  • Diameter: ~2.068 km
  • Magnitude: 16.1

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: 2.87 days

Size Comparison

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.