Key Facts

  • Categorized as a Main-belt Asteroid
  • Comparable in size to the U.S. state of Rhode Island (40.33 km diameter)
  • Not a Near Earth Object
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

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

Alemannia orbits the sun every 1,520 days (4.16 years), coming as close as 2.28 AU and reaching as far as 2.90 AU from the sun. Alemannia is about 40.3 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the U.S. state of Rhode Island.

The rotation of Alemannia has been observed. It completes a rotation on its axis every 4.67 hours.

Alemannia's spectral type M (Tholen) / None (SMASSII) indicates that it is likely to contain iron, nickel, and cobalt.

No Close Approaches

Alemannia's orbit is 1.29 AU from Earth's orbit at its closest point. This means that there is an extremely 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

Alemannia's orbit is determined by observations dating back to Dec. 17, 1905. It was last officially observed on May 15, 2023. The IAU Minor Planet Center records 4,470 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 Alemannia:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 2.593 AU
  • Eccentricity: 0.1188
  • Inclination: 6.82°
  • Longitude of Ascending Node: 248.72°
  • Argument of Periapsis: 125.98°
  • Mean Anomaly: 127.28°

Physical Characteristics

  • Diameter: 40.33000 km
  • Magnitude: 9.8
  • Albedo: 0.201
  • Spectral type (Tholen): M

Derived Characteristics

  • Orbit Period: 1,520 days (4.16 years)
  • Avg. Orbit Speed: 18.56 km/s
  • Aphelion Distance: 2.90 AU
  • Perihelion Distance: 2.28 AU
  • Rotation Period: 4.67 hours
  • Approx. Composition: iron, nickel, and cobalt.

Map Comparison

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Orbit Simulation

Sky Map

The position of Alemannia 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.