Key Facts

Overview

Mameta is a large asteroid that orbits between Mars and Jupiter in the outer reaches of the main asteroid belt. NASA JPL has not classified Mameta as potentially hazardous because its orbit does not bring it close to Earth.

Mameta orbits the sun every 2,920 days (7.99 years), coming as close as 2.97 AU and reaching as far as 5.02 AU from the sun. Mameta is about 25.2 kilometers in diameter, making it larger than 99% of asteroids, comparable in size to the city of Indianapolis.

No Close Approaches

Mameta's orbit is 1.99 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

Mameta's orbit is determined by observations dating back to Feb. 23, 1990. It was last officially observed on June 13, 2023. The IAU Minor Planet Center records 3,029 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 Mameta:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 3.997 AU
  • Eccentricity: 0.2561
  • Inclination: 4.52°
  • Longitude of Ascending Node: 159.92°
  • Argument of Periapsis: 258.33°
  • Mean Anomaly: 126.3°

Physical Characteristics

  • Diameter: 25.18400 km
  • Magnitude: 11.92
  • Albedo: 0.058

Derived Characteristics

  • Orbit Period: 2,920 days (7.99 years)
  • Avg. Orbit Speed: 14.89 km/s
  • Aphelion Distance: 5.02 AU
  • Perihelion Distance: 2.97 AU

Map Comparison

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Orbit Simulation

Sky Map

The position of Mameta 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.