Key Facts


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

Constantia orbits the sun every 1,230 days (3.37 years), coming as close as 1.87 AU and reaching as far as 2.62 AU from the sun. Constantia is about 6.5 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the San Francisco Bay.

The rotation of Constantia has been observed. It completes a rotation on its axis every 5.35 days.

No Close Approaches

Constantia's orbit is 0.86 AU from Earth's orbit at its closest point. This means that there is an 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

Constantia's orbit is determined by observations dating back to Oct. 7, 1928. It was last officially observed on Feb. 2, 2020. The IAU Minor Planet Center records 2,656 observations used to determine its orbit.

Scientists have been able to determine this object's shape.

View asteroid Constantia in 3D.

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 Constantia:



   or view a random object

Orbital Elements

  • Epoch: 2459000.5 JD
  • Semi-major axis: 2.242 AU
  • Eccentricity: 0.1681
  • Inclination: 2.43°
  • Longitude of Ascending Node: 161.63°
  • Argument of Periapsis: 172.91°
  • Mean Anomaly: 137.76°

Physical Characteristics

  • Diameter: 6.53400 km
  • Magnitude: 12.5
  • Albedo: 0.217

Derived Characteristics

  • Orbit Period: 1,230 days (3.37 years)
  • Avg. Orbit Speed: 19.83 km/s
  • Aphelion Distance: 2.62 AU
  • Perihelion Distance: 1.87 AU
  • Rotation Period: 5.35 days

Size Comparison

Orbit Simulation

Sky Map

The position of Constantia 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.