Key Facts

Overview

Hela is a relatively small asteroid with an orbit that crosses the orbit of Mars. NASA JPL has not classified Hela as potentially hazardous because its orbit does not bring it close to Earth.

Hela orbits the sun every 1,541 days (4.22 years), coming as close as 1.54 AU and reaching as far as 3.68 AU from the sun. Based on its brightness and the way it reflects light, Hela is probably between 12.038 to 26.918 kilometers in diameter, making it larger than most asteroids, very roughly comparable in size to the city of Philadelphia.

The rotation of Hela has been observed. It completes a rotation on its axis every 3.40 days.

Hela's spectral type S (Tholen) / Sq (SMASSII) indicates that it is likely to contain magnesium silicate and iron silicate.

No Close Approaches

Hela's orbit is 0.62 AU from Earth's orbit at its closest point. This means that there is an 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

Hela's orbit is determined by observations dating back to Nov. 21, 1902. It was last officially observed on May 11, 2019. The IAU Minor Planet Center records 2,172 observations used to determine its orbit.

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

View asteroid Hela 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 Hela:

References

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Orbital Elements

  • Epoch: 2458600.5 JD
  • Semi-major axis: 2.61099755659 AU
  • Eccentricity: 0.410284355469
  • Inclination: 15.2991803796°
  • Longitude of Ascending Node: 242.551765846°
  • Argument of Periapsis: 91.3995138107°
  • Mean Anomaly: 237.586384619°

Physical Characteristics

  • Diameter: ~15.541 km
  • Magnitude: 11.72
  • Spectral type (Tholen): S
  • Spectral type (SMASS): Sq

Derived Characteristics

  • Orbit Period: 1,541 days (4.22 years)
  • Avg. Orbit Speed: 18.43 km/s
  • Aphelion Distance: 3.68 AU
  • Perihelion Distance: 1.54 AU
  • Rotation Period: 3.40 days
  • Approx. Composition: magnesium silicate and iron silicate.

Size Comparison

Orbit Simulation

Sky Map

The position of Hela 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.