137175 (1999 JA11)

Small Apollo-class Asteroid

Near-Earth
Space Reference » Apollo-class Asteroids » 137175 (1999 JA11)

Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to the Golden Gate Bridge
  • Will pass within 17,351,034 km of Earth in 2023
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

137175 (1999 JA11) is a small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 1999 JA11 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 JA11 orbits the sun every 518 days (1.42 years), coming as close as 0.83 AU and reaching as far as 1.69 AU from the sun. Based on its brightness and the way it reflects light, 1999 JA11 is probably between 0.571 to 1.277 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.

Close Approaches

1999 JA11's orbit is 0.11 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.

1999 JA11 has 10 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Feb. 3, 2023 17,351,034 12.827
Feb. 4, 2040 17,379,174 12.808
Feb. 4, 2057 17,924,133 12.931
Feb. 7, 2074 19,737,105 13.322
Feb. 11, 2091 23,051,587 13.941
Feb. 18, 2108 29,477,296 15.132
Dec. 27, 2134 28,351,028 11.667
Jan. 8, 2152 23,139,122 11.668
Jan. 15, 2169 19,773,636 11.737
Jan. 20, 2186 18,112,383 11.814

Images and Observations

1999 JA11's orbit is determined by observations dating back to May 14, 1999. It was last officially observed on July 7, 2023. The IAU Minor Planet Center records 541 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 JA11:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.262 AU
  • Eccentricity: 0.3413
  • Inclination: 16.43°
  • Longitude of Ascending Node: 116.22°
  • Argument of Periapsis: 328.34°
  • Mean Anomaly: 177.36°

Physical Characteristics

  • Diameter: ~0.737 km
  • Magnitude: 18.34

Derived Characteristics

  • Orbit Period: 518 days (1.42 years)
  • Avg. Orbit Speed: 26.50 km/s
  • Aphelion Distance: 1.69 AU
  • Perihelion Distance: 0.83 AU

Map Comparison

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Orbit Simulation

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Sky Map

The position of 137175 (1999 JA11) 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 JA11 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.