Key Facts

Overview

Alekhin is a large asteroid orbiting between Mars and Jupiter in the main portion of the asteroid belt. NASA JPL has not classified Alekhin as potentially hazardous because its orbit does not bring it close to Earth.

Alekhin orbits the sun every 1,380 days (3.78 years), coming as close as 1.87 AU and reaching as far as 2.97 AU from the sun. Alekhin is about 18.7 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the city of Philadelphia.

The rotation of Alekhin has been observed. It completes a rotation on its axis every 148.60 hours.

No Close Approaches

Alekhin's orbit is 0.86 AU from Earth's orbit at its closest point. This means that there is a very 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

Alekhin's orbit is determined by observations dating back to April 14, 1926. It was last officially observed on April 1, 2023. The IAU Minor Planet Center records 4,530 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 Alekhin:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 2.421 AU
  • Eccentricity: 0.2274
  • Inclination: 1.8°
  • Longitude of Ascending Node: 227.29°
  • Argument of Periapsis: 5.84°
  • Mean Anomaly: 268.79°

Physical Characteristics

  • Diameter: 18.68100 km
  • Magnitude: 12.82
  • Albedo: 0.060

Derived Characteristics

  • Orbit Period: 1,380 days (3.78 years)
  • Avg. Orbit Speed: 19.09 km/s
  • Aphelion Distance: 2.97 AU
  • Perihelion Distance: 1.87 AU
  • Rotation Period: 148.60 hours

Map Comparison

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Orbit Simulation

Sky Map

The position of Alekhin 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.