Key Facts


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

Isara orbits the sun every 1,210 days (3.31 years), coming as close as 1.89 AU and reaching as far as 2.55 AU from the sun. Isara is about 25.9 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the city of Indianapolis.

The rotation of Isara has been observed. It completes a rotation on its axis every 9.16 hours.

No Close Approaches

Isara's orbit is 0.91 AU from Earth's orbit at its closest point. This means that there is a 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

Isara's orbit is determined by observations dating back to March 20, 1893. It was last officially observed on June 30, 2023. The IAU Minor Planet Center records 16,070 observations used to determine its orbit.

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

View asteroid Isara 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 Isara:



   or view a random object

Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 2.22 AU
  • Eccentricity: 0.1492
  • Inclination: 6.0°
  • Longitude of Ascending Node: 105.51°
  • Argument of Periapsis: 313.18°
  • Mean Anomaly: 257.02°

Physical Characteristics

  • Diameter: 25.90100 km
  • Magnitude: 9.95
  • Albedo: 0.300
  • Spectral type (Tholen): S

Derived Characteristics

  • Orbit Period: 1,210 days (3.31 years)
  • Avg. Orbit Speed: 19.96 km/s
  • Aphelion Distance: 2.55 AU
  • Perihelion Distance: 1.89 AU
  • Rotation Period: 9.16 hours

Map Comparison

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Orbit Simulation

Sky Map

The position of Isara 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.