Key Facts


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

Stefanovalentini orbits the sun every 2,800 days (7.67 years), coming as close as 3.72 AU and reaching as far as 4.05 AU from the sun. Based on its brightness and the way it reflects light, Stefanovalentini is probably between 14.607 to 32.662 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the city of Philadelphia.

The rotation of Stefanovalentini has been observed. It completes a rotation on its axis every 11.84 hours.

No Close Approaches

Stefanovalentini's orbit is 2.70 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

Stefanovalentini's orbit is determined by observations dating back to May 2, 1976. It was last officially observed on Jan. 20, 2021. The IAU Minor Planet Center records 2,453 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 Stefanovalentini:



   or view a random object

Orbital Elements

  • Epoch: 2459200.5 JD
  • Semi-major axis: 3.885 AU
  • Eccentricity: 0.0423
  • Inclination: 4.65°
  • Longitude of Ascending Node: 326.8°
  • Argument of Periapsis: 337.87°
  • Mean Anomaly: 213.79°

Physical Characteristics

  • Diameter: ~18.857 km
  • Magnitude: 11.3

Derived Characteristics

  • Orbit Period: 2,800 days (7.67 years)
  • Avg. Orbit Speed: 15.09 km/s
  • Aphelion Distance: 4.05 AU
  • Perihelion Distance: 3.72 AU
  • Rotation Period: 11.84 hours

Map Comparison

Click to load map

Orbit Simulation

Sky Map

The position of Stefanovalentini 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.