Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to Mount Everest (2.10 km diameter)
  • Will pass within 28,891,863 km of Earth in 2094
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

Antinous is a small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified Antinous 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.

Antinous orbits the sun every 1,240 days (3.39 years), coming as close as 0.89 AU and reaching as far as 3.63 AU from the sun. Antinous is about 2.1 kilometers in diameter, making it larger than most asteroids, comparable in size to Mount Everest.

The rotation of Antinous has been observed. It completes a rotation on its axis every 7.45 days.

Antinous's spectral type SU (Tholen) / Sq (SMASSII) indicates that it is likely to contain magnesium silicate and iron silicate.

Close Approaches

Antinous's orbit is 0.18 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.

Antinous has 1 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Aug. 13, 2094 28,891,863 18.044

Images and Observations

Antinous's orbit is determined by observations dating back to March 5, 1948. It was last officially observed on May 22, 2019. The IAU Minor Planet Center records 997 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 Antinous:

References

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Orbital Elements

  • Epoch: 2458600.5 JD
  • Semi-major axis: 2.25873264688 AU
  • Eccentricity: 0.606567806588
  • Inclination: 18.4001058628°
  • Longitude of Ascending Node: 346.443882223°
  • Argument of Periapsis: 268.061955922°
  • Mean Anomaly: 313.660445983°

Physical Characteristics

  • Diameter: 2.10000 km
  • Magnitude: 15.54
  • Albedo: 0.24
  • Spectral type (Tholen): SU
  • Spectral type (SMASS): Sq

Derived Characteristics

  • Orbit Period: 1,240 days (3.39 years)
  • Avg. Orbit Speed: 19.82 km/s
  • Aphelion Distance: 3.63 AU
  • Perihelion Distance: 0.89 AU
  • Rotation Period: 7.45 days
  • Approx. Composition: magnesium silicate and iron silicate.

Size Comparison

Orbit Simulation

Sky Map

The position of Antinous 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.