508774 (1999 JE1)

Very small Apollo-class Asteroid

Near-Earth Potentially Hazardous
Space Reference » Apollo-class Asteroids » 508774 (1999 JE1)

Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to a football field
  • Will pass within 14,504,522 km of Earth in 2031
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

508774 (1999 JE1) is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 1999 JE1 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

1999 JE1 orbits the sun every 556 days (1.52 years), coming as close as 0.39 AU and reaching as far as 2.25 AU from the sun. Its orbit is highly elliptical. Based on its brightness and the way it reflects light, 1999 JE1 is probably between 0.256 to 0.573 kilometers in diameter, making it larger than 90% of asteroids but tiny compared to large asteroids, very roughly comparable in size to a football field.

1999 JE1's spectral type None (Tholen) / Sq (SMASSII) indicates that it is likely to contain and .

Close Approaches

1999 JE1's orbit is 0.02 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 JE1 has 9 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
May 14, 2031 14,504,522 27.850
May 23, 2034 25,081,461 20.822
May 15, 2066 8,652,349 26.621
May 16, 2101 10,739,669 27.010
May 25, 2104 28,158,629 20.328
May 13, 2136 18,640,848 28.569
May 24, 2139 19,896,950 21.759
May 12, 2171 27,113,775 30.241
May 22, 2174 11,613,575 23.316

Images and Observations

1999 JE1's orbit is determined by observations dating back to May 7, 1999. It was last officially observed on Feb. 1, 2021. The IAU Minor Planet Center records 161 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 JE1:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.323 AU
  • Eccentricity: 0.7018
  • Inclination: 20.91°
  • Longitude of Ascending Node: 53.06°
  • Argument of Periapsis: 302.74°
  • Mean Anomaly: 315.1°

Physical Characteristics

  • Diameter: ~0.331 km
  • Magnitude: 20.08
  • Spectral type (SMASS): Sq

Derived Characteristics

  • Orbit Period: 556 days (1.52 years)
  • Avg. Orbit Speed: 25.89 km/s
  • Aphelion Distance: 2.25 AU
  • Perihelion Distance: 0.39 AU
  • Approx. Composition: and .

Map Comparison

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Orbit Simulation

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Sky Map

The position of 508774 (1999 JE1) 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 1999 JE1 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.