Key Facts

Overview

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

Tsunenaga orbits the sun every 1,920 days (5.26 years), coming as close as 2.92 AU and reaching as far as 3.12 AU from the sun. Based on its brightness and the way it reflects light, Tsunenaga is probably between 8.562 to 19.144 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the city of Boston.

No Close Approaches

Tsunenaga's orbit is 1.92 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

Tsunenaga's orbit is determined by observations dating back to April 5, 1981. It was last officially observed on July 4, 2023. The IAU Minor Planet Center records 3,524 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 Tsunenaga:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 3.019 AU
  • Eccentricity: 0.0331
  • Inclination: 9.84°
  • Longitude of Ascending Node: 179.59°
  • Argument of Periapsis: 350.37°
  • Mean Anomaly: 50.9°

Physical Characteristics

  • Diameter: ~11.053 km
  • Magnitude: 12.46

Derived Characteristics

  • Orbit Period: 1,920 days (5.26 years)
  • Avg. Orbit Speed: 17.11 km/s
  • Aphelion Distance: 3.12 AU
  • Perihelion Distance: 2.92 AU

Map Comparison

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Orbit Simulation

Sky Map

The position of Tsunenaga 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.