Key Facts

  • Categorized as a Jupiter Trojan
  • Comparable in size to the U.S. state of Rhode Island (46.46 km diameter)
  • Not a Near Earth Object
  • Not a Potentially Hazardous Object
  • See orbit simulation


Kalchas is a large asteroid that shares Jupiter's orbit around the sun. NASA JPL has not classified Kalchas as potentially hazardous because its orbit does not bring it close to Earth.

Kalchas orbits the sun every 4,300 days (11.77 years), coming as close as 4.94 AU and reaching as far as 5.40 AU from the sun. Kalchas is about 46.5 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the U.S. state of Rhode Island.

The rotation of Kalchas has been observed. It completes a rotation on its axis every 29.20 hours.

No Close Approaches

Kalchas's orbit is 3.94 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

Kalchas's orbit is determined by observations dating back to May 8, 1956. It was last officially observed on Sept. 6, 2022. The IAU Minor Planet Center records 3,434 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 Kalchas:



   or view a random object

Orbital Elements

  • Epoch: 2459800.5 JD
  • Semi-major axis: 5.171 AU
  • Eccentricity: 0.0448
  • Inclination: 2.1°
  • Longitude of Ascending Node: 208.01°
  • Argument of Periapsis: 166.08°
  • Mean Anomaly: 56.0°

Physical Characteristics

  • Diameter: 46.46200 km
  • Magnitude: 10.15
  • Albedo: 0.082

Derived Characteristics

  • Orbit Period: 4,300 days (11.77 years)
  • Avg. Orbit Speed: 13.08 km/s
  • Aphelion Distance: 5.40 AU
  • Perihelion Distance: 4.94 AU
  • Rotation Period: 29.20 hours

Map Comparison

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Orbit Simulation

Sky Map

The position of Kalchas 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.