Key Facts

  • Categorized as a Main-belt Asteroid
  • Comparable in size to the U.S. state of Rhode Island (52.91 km diameter)
  • Not a Near Earth Object
  • Not a Potentially Hazardous Object
  • See orbit simulation


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

Tolosa orbits the sun every 1,400 days (3.83 years), coming as close as 2.05 AU and reaching as far as 2.85 AU from the sun. Tolosa is about 52.9 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the U.S. state of Rhode Island.

The rotation of Tolosa has been observed. It completes a rotation on its axis every 10.10 hours.

No Close Approaches

Tolosa's orbit is 1.04 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

Tolosa's orbit is determined by observations dating back to May 30, 1897. It was last officially observed on June 8, 2022. The IAU Minor Planet Center records 3,797 observations used to determine its orbit.

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

View asteroid Tolosa 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 Tolosa:



   or view a random object

Orbital Elements

  • Epoch: 2459800.5 JD
  • Semi-major axis: 2.449 AU
  • Eccentricity: 0.1621
  • Inclination: 3.2°
  • Longitude of Ascending Node: 54.73°
  • Argument of Periapsis: 260.61°
  • Mean Anomaly: 194.35°

Physical Characteristics

  • Diameter: 52.90500 km
  • Magnitude: 8.88
  • Albedo: 0.273
  • Spectral type (Tholen): S

Derived Characteristics

  • Orbit Period: 1,400 days (3.83 years)
  • Avg. Orbit Speed: 19.03 km/s
  • Aphelion Distance: 2.85 AU
  • Perihelion Distance: 2.05 AU
  • Rotation Period: 10.10 hours

Map Comparison

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Orbit Simulation

Sky Map

The position of Tolosa 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.