136822 (1997 PW4)

Mid-sized Outer Main-belt Asteroid

Space Reference » Outer Main-belt Asteroids » 136822 (1997 PW4)

Key Facts

Overview

136822 (1997 PW4) is a mid-sized asteroid that orbits between Mars and Jupiter in the outer reaches of the main asteroid belt. NASA JPL has not classified 1997 PW4 as potentially hazardous because its orbit does not bring it close to Earth.

1997 PW4 orbits the sun every 2,880 days (7.89 years), coming as close as 3.44 AU and reaching as far as 4.49 AU from the sun. Based on its brightness and the way it reflects light, 1997 PW4 is probably between 3.602 to 8.055 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the San Francisco Bay.

No Close Approaches

1997 PW4's orbit is 2.43 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

1997 PW4's orbit is determined by observations dating back to Aug. 10, 1997. It was last officially observed on Dec. 13, 2022. The IAU Minor Planet Center records 608 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 1997 PW4:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 3.965 AU
  • Eccentricity: 0.132
  • Inclination: 3.34°
  • Longitude of Ascending Node: 155.2°
  • Argument of Periapsis: 170.79°
  • Mean Anomaly: 105.39°

Physical Characteristics

  • Diameter: ~4.650 km
  • Magnitude: 14.34

Derived Characteristics

  • Orbit Period: 2,880 days (7.89 years)
  • Avg. Orbit Speed: 14.98 km/s
  • Aphelion Distance: 4.49 AU
  • Perihelion Distance: 3.44 AU

Map Comparison

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Orbit Simulation

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Sky Map

The position of 136822 (1997 PW4) 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 1997 PW4 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.