Key Facts

Overview

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

Helffrich orbits the sun every 1,520 days (4.16 years), coming as close as 1.99 AU and reaching as far as 3.20 AU from the sun. Helffrich is about 17.3 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the city of Philadelphia.

The rotation of Helffrich has been observed. It completes a rotation on its axis every 95.88 hours.

No Close Approaches

Helffrich'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

Helffrich's orbit is determined by observations dating back to Feb. 14, 1932. It was last officially observed on March 28, 2023. The IAU Minor Planet Center records 4,534 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 Helffrich:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 2.592 AU
  • Eccentricity: 0.2328
  • Inclination: 11.55°
  • Longitude of Ascending Node: 155.88°
  • Argument of Periapsis: 270.4°
  • Mean Anomaly: 49.49°

Physical Characteristics

  • Diameter: 17.33300 km
  • Magnitude: 12.69
  • Albedo: 0.049

Derived Characteristics

  • Orbit Period: 1,520 days (4.16 years)
  • Avg. Orbit Speed: 18.55 km/s
  • Aphelion Distance: 3.20 AU
  • Perihelion Distance: 1.99 AU
  • Rotation Period: 95.88 hours

Map Comparison

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Orbit Simulation

Sky Map

The position of Helffrich 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.