Johnzhou

22573 Johnzhou (1998 HY43)

Space Reference » Main-belt Asteroids » Johnzhou

Key Facts

Overview

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

Johnzhou orbits the sun every 1,230 days (3.37 years), coming as close as 1.97 AU and reaching as far as 2.52 AU from the sun. Based on its brightness and the way it reflects light, Johnzhou is probably between 1.669 to 3.733 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to Mount Everest.

No Close Approaches

Johnzhou's orbit is 0.96 AU from Earth's orbit at its closest point. This means that there is a 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

Johnzhou's orbit is determined by observations dating back to Dec. 14, 1993. It was last officially observed on Nov. 11, 2022. The IAU Minor Planet Center records 1,193 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 Johnzhou:

References

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Orbital Elements

  • Epoch: 2460200.5 JD
  • Semi-major axis: 2.247 AU
  • Eccentricity: 0.1218
  • Inclination: 3.27°
  • Longitude of Ascending Node: 53.46°
  • Argument of Periapsis: 243.87°
  • Mean Anomaly: 115.85°

Physical Characteristics

  • Diameter: ~2.155 km
  • Magnitude: 16.01

Derived Characteristics

  • Orbit Period: 1,230 days (3.37 years)
  • Avg. Orbit Speed: 19.87 km/s
  • Aphelion Distance: 2.52 AU
  • Perihelion Distance: 1.97 AU

Map Comparison

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Orbit Simulation

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Sky Map

The position of Johnzhou 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 Johnzhou 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.