5828 (1991 AM)

Mid-sized Apollo-class Asteroid

Near-Earth
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Key Facts

Overview

5828 (1991 AM) is a mid-sized asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 1991 AM 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.

1991 AM orbits the sun every 808 days (2.21 years), coming as close as 0.52 AU and reaching as far as 2.88 AU from the sun. 1991 AM is about 1.5 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the U.S. Pentagon.

The rotation of 1991 AM has been observed. It completes a rotation on its axis every 2.67 hours.

1991 AM's spectral type None (Tholen) / Q (SMASSII) indicates that it is likely to contain .

No Close Approaches

1991 AM's orbit is 0.40 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

1991 AM's orbit is determined by observations dating back to Nov. 13, 1982. It was last officially observed on Feb. 8, 2023. The IAU Minor Planet Center records 921 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 1991 AM:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 1.698 AU
  • Eccentricity: 0.6949
  • Inclination: 30.12°
  • Longitude of Ascending Node: 125.42°
  • Argument of Periapsis: 152.77°
  • Mean Anomaly: 239.42°

Physical Characteristics

  • Diameter: 1.45700 km
  • Magnitude: 16.03
  • Albedo: 0.331
  • Spectral type (SMASS): Q

Derived Characteristics

  • Orbit Period: 808 days (2.21 years)
  • Avg. Orbit Speed: 22.86 km/s
  • Aphelion Distance: 2.88 AU
  • Perihelion Distance: 0.52 AU
  • Rotation Period: 2.67 hours
  • Approx. Composition: .

Map Comparison

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Orbit Simulation

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Sky Map

The position of 5828 (1991 AM) 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 1991 AM 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.