Annafreud

11299 Annafreud (1992 SA22)

Space Reference » Main-belt Asteroids » Annafreud

Key Facts

Overview

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

Annafreud orbits the sun every 1,650 days (4.52 years), coming as close as 2.60 AU and reaching as far as 2.87 AU from the sun. Annafreud is about 5.1 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the San Francisco Bay.

No Close Approaches

Annafreud's orbit is 1.59 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

Annafreud's orbit is determined by observations dating back to Sept. 22, 1992. It was last officially observed on June 30, 2023. The IAU Minor Planet Center records 2,351 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 Annafreud:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 2.735 AU
  • Eccentricity: 0.0478
  • Inclination: 4.41°
  • Longitude of Ascending Node: 29.45°
  • Argument of Periapsis: 240.14°
  • Mean Anomaly: 22.28°

Physical Characteristics

  • Diameter: 5.07800 km
  • Magnitude: 13.97
  • Albedo: 0.189

Derived Characteristics

  • Orbit Period: 1,650 days (4.52 years)
  • Avg. Orbit Speed: 18.03 km/s
  • Aphelion Distance: 2.87 AU
  • Perihelion Distance: 2.60 AU

Map Comparison

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Orbit Simulation

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Sky Map

The position of Annafreud 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.

Size Rendering

The above comparison is an artistic rendering that uses available data on the diameter of Annafreud to create an approximate landscape rendering with Mount Everest in the background. This approximation is built for full-resolution desktop browsers. Shape, color, and texture of asteroid are imagined.