139056 (2001 FY)

Very small Amor-class Asteroid

Near-Earth
Space Reference » Amor-class Asteroids » 139056 (2001 FY)

Key Facts

Overview

139056 (2001 FY) is a very small asteroid whose orbit approaches the orbit of Earth but does not cross it. NASA JPL has classified 2001 FY 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.

2001 FY orbits the sun every 946 days (2.59 years), coming as close as 1.27 AU and reaching as far as 2.50 AU from the sun. 2001 FY is about 0.3 kilometers in diameter, making it larger than 90% of asteroids but tiny compared to large asteroids, comparable in size to a football field.

The rotation of 2001 FY has been observed. It completes a rotation on its axis every 5.21 hours.

2001 FY's spectral type None (Tholen) / S (SMASSII) indicates that it is likely to contain and .

No Close Approaches

2001 FY's orbit is 0.27 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.

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

Images and Observations

2001 FY's orbit is determined by observations dating back to March 16, 2001. It was last officially observed on Sept. 14, 2022. The IAU Minor Planet Center records 285 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 2001 FY:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.886 AU
  • Eccentricity: 0.3278
  • Inclination: 4.73°
  • Longitude of Ascending Node: 111.15°
  • Argument of Periapsis: 110.65°
  • Mean Anomaly: 227.18°

Physical Characteristics

  • Diameter: 0.32000 km
  • Magnitude: 19.18
  • Albedo: 0.52
  • Spectral type (SMASS): S

Derived Characteristics

  • Orbit Period: 946 days (2.59 years)
  • Avg. Orbit Speed: 21.69 km/s
  • Aphelion Distance: 2.50 AU
  • Perihelion Distance: 1.27 AU
  • Rotation Period: 5.21 hours
  • Approx. Composition: and .

Map Comparison

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Orbit Simulation

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Sky Map

The position of 139056 (2001 FY) 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 2001 FY 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.