Key Facts


Hecuba is a large asteroid that orbits between Mars and Jupiter in the outer reaches of the main asteroid belt. NASA JPL has not classified Hecuba as potentially hazardous because its orbit does not bring it close to Earth.

Hecuba orbits the sun every 2,120 days (5.80 years), coming as close as 3.03 AU and reaching as far as 3.44 AU from the sun. Hecuba is about 75.5 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the U.S. state of Delaware.

The rotation of Hecuba has been observed. It completes a rotation on its axis every 14.26 hours.

Hecuba's spectral type S (Tholen) / Sl (SMASSII) indicates that it is likely to contain and .

No Close Approaches

Hecuba's orbit is 2.03 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

Hecuba's orbit is determined by observations dating back to Jan. 26, 1880. It was last officially observed on March 5, 2023. The IAU Minor Planet Center records 4,417 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 Hecuba:



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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 3.233 AU
  • Eccentricity: 0.0625
  • Inclination: 4.21°
  • Longitude of Ascending Node: 349.76°
  • Argument of Periapsis: 212.59°
  • Mean Anomaly: 237.92°

Physical Characteristics

  • Diameter: 75.49800 km
  • Magnitude: 8.01
  • Albedo: 0.148
  • Spectral type (Tholen): S
  • Spectral type (SMASS): Sl

Derived Characteristics

  • Orbit Period: 2,120 days (5.80 years)
  • Avg. Orbit Speed: 16.59 km/s
  • Aphelion Distance: 3.44 AU
  • Perihelion Distance: 3.03 AU
  • Rotation Period: 14.26 hours
  • Approx. Composition: and .

Map Comparison

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Orbit Simulation

Sky Map

The position of Hecuba 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.