137108 (1999 AN10)

Small Apollo-class Asteroid

Near-Earth Potentially Hazardous
Space Reference » Apollo-class Asteroids » 137108 (1999 AN10)

Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to the Golden Gate Bridge
  • Will pass within 389,861 km of Earth in 2027
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

137108 (1999 AN10) is a small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 1999 AN10 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

1999 AN10 orbits the sun every 643 days (1.76 years), coming as close as 0.64 AU and reaching as far as 2.28 AU from the sun. Based on its brightness and the way it reflects light, 1999 AN10 is probably between 0.652 to 1.459 kilometers in diameter, making it larger than ~97% of asteroids but small compared to large asteroids, very roughly comparable in size to the Golden Gate Bridge.

The rotation of 1999 AN10 has been observed. It completes a rotation on its axis every 5.04 hours.

Close Approaches

1999 AN10's orbit is 0.00 AU from Earth's orbit at its closest point. This means that its orbit is very close to Earth's orbit.

1999 AN10 has 13 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Aug. 7, 2027 389,861 26.284
July 30, 2034 26,878,546 23.091
Feb. 4, 2076 3,988,009 26.306
Aug. 11, 2081 14,536,956 28.296
Jan. 29, 2083 16,487,120 29.090
Aug. 5, 2088 5,190,144 25.616
Feb. 6, 2137 8,279,591 25.729
Aug. 13, 2142 17,141,262 28.663
Jan. 31, 2144 14,295,185 28.774
Aug. 6, 2149 4,786,611 25.684
Feb. 9, 2191 18,211,044 24.521
Aug. 14, 2196 22,847,129 29.507
Feb. 1, 2198 9,779,294 28.122

Images and Observations

1999 AN10's orbit is determined by observations dating back to Jan. 26, 1955. It was last officially observed on Jan. 13, 2022. The IAU Minor Planet Center records 408 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 AN10:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.459 AU
  • Eccentricity: 0.5622
  • Inclination: 39.93°
  • Longitude of Ascending Node: 314.35°
  • Argument of Periapsis: 268.33°
  • Mean Anomaly: 313.2°

Physical Characteristics

  • Diameter: ~0.842 km
  • Magnitude: 18.05

Derived Characteristics

  • Orbit Period: 643 days (1.76 years)
  • Avg. Orbit Speed: 24.69 km/s
  • Aphelion Distance: 2.28 AU
  • Perihelion Distance: 0.64 AU
  • Rotation Period: 5.04 hours

Map Comparison

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Orbit Simulation

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Sky Map

The position of 137108 (1999 AN10) 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 1999 AN10 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.