Key Facts

  • Categorized as a Aten-class Asteroid
  • Comparable in size to Mount Everest (2.24 km diameter)
  • Will pass within 23,267,323 km of Earth in 2047
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

137805 (1999 YK5) is a mid-sized asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 1999 YK5 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.

1999 YK5 orbits the sun every 276 days (0.76 years), coming as close as 0.37 AU and reaching as far as 1.29 AU from the sun. 1999 YK5 is about 2.2 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to Mount Everest.

The rotation of 1999 YK5 has been observed. It completes a rotation on its axis every 3.93 days.

1999 YK5's spectral type None (Tholen) / X (SMASSII) indicates that it is likely to contain nickel, iron, and cobalt.

Close Approaches

1999 YK5's orbit is 0.11 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.

1999 YK5 has 13 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Feb. 14, 2047 23,267,323 21.805
Feb. 18, 2050 17,226,616 18.094
Feb. 20, 2053 27,547,287 14.763
Feb. 11, 2081 28,859,880 23.347
Feb. 17, 2084 17,634,991 19.639
Feb. 20, 2087 21,310,027 16.217
Feb. 16, 2118 20,445,732 20.962
Feb. 19, 2121 17,985,187 17.390
Feb. 14, 2152 26,759,822 22.827
Feb. 18, 2155 16,748,059 19.062
Feb. 21, 2158 23,359,741 15.635
Feb. 17, 2189 18,686,836 20.359
Feb. 21, 2192 19,107,854 16.814

Images and Observations

1999 YK5's orbit is determined by observations dating back to Dec. 28, 1999. It was last officially observed on Nov. 12, 2019. The IAU Minor Planet Center records 1,149 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 1999 YK5:

References

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Orbital Elements

  • Epoch: 2459000.5 JD
  • Semi-major axis: 0.8294 AU
  • Eccentricity: 0.5583
  • Inclination: 16.75°
  • Longitude of Ascending Node: 349.55°
  • Argument of Periapsis: 292.85°
  • Mean Anomaly: 162.76°

Physical Characteristics

  • Diameter: 2.24300 km
  • Magnitude: 16.7
  • Albedo: 0.027
  • Spectral type (SMASS): X

Derived Characteristics

  • Orbit Period: 276 days (0.76 years)
  • Avg. Orbit Speed: 32.69 km/s
  • Aphelion Distance: 1.29 AU
  • Perihelion Distance: 0.37 AU
  • Rotation Period: 3.93 days
  • Approx. Composition: nickel, iron, and cobalt.

Size Comparison

Orbit Simulation

Sky Map

The position of 137805 (1999 YK5) 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.