Key Facts

Overview

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

Sarahill orbits the sun every 1,640 days (4.49 years), coming as close as 2.55 AU and reaching as far as 2.89 AU from the sun. Sarahill is about 19.5 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the city of Denver.

The rotation of Sarahill has been observed. It completes a rotation on its axis every 7.45 hours.

Sarahill's spectral type None (Tholen) / Ch (SMASSII) indicates that it is likely to contain water, iron, nickel, cobalt, nitrogen, and ammonia.

No Close Approaches

Sarahill's orbit is 1.56 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

Sarahill's orbit is determined by observations dating back to July 29, 1954. It was last officially observed on March 5, 2023. The IAU Minor Planet Center records 3,981 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 Sarahill:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 2.718 AU
  • Eccentricity: 0.0634
  • Inclination: 4.29°
  • Longitude of Ascending Node: 302.79°
  • Argument of Periapsis: 213.2°
  • Mean Anomaly: 300.16°

Physical Characteristics

  • Diameter: 19.49900 km
  • Magnitude: 12.47
  • Albedo: 0.066
  • Spectral type (SMASS): Ch

Derived Characteristics

  • Orbit Period: 1,640 days (4.49 years)
  • Avg. Orbit Speed: 18.03 km/s
  • Aphelion Distance: 2.89 AU
  • Perihelion Distance: 2.55 AU
  • Rotation Period: 7.45 hours
  • Approx. Composition: water, iron, nickel, cobalt, nitrogen, and ammonia.

Map Comparison

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Orbit Simulation

Sky Map

The position of Sarahill 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.