Key Facts

Overview

C/1811 W1 (Pons) is a large comet whose orbit does not match any defined comet orbit class. NASA JPL has not classified Pons as potentially hazardous because its orbit does not bring it close to Earth.

Pons orbits the sun every 276,000 days (755.65 years), coming as close as 1.58 AU and reaching as far as 164.18 AU from the sun. Its orbit is highly elliptical. Based on its brightness and the way it reflects light, Pons is probably between 2658.000 to 5943.469 kilometers in diameter, making it the largest asteroid/dwarf planet, very roughly comparable in size to the U.S. state of Alaska.

No Close Approaches

Pons's orbit is 0.00 AU from Earth's orbit at its closest point. This means that its orbit is very close to Earth's orbit.

Orbital simulations conducted by NASA JPL's CNEOS do not show any close approaches to Earth.

Images and Observations

Pons's orbit is determined by observations dating back to Nov. 18, 1811. It was last officially observed on Feb. 16, 1812. The IAU Minor Planet Center records 69 observations used to determine its orbit.

Accessibility and Exploration

This comet is not considered a viable target for human exploration by the NHATS study.

References

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Orbital Elements

  • Epoch: 2382828.0 JD
  • Semi-major axis: 82.88 AU
  • Eccentricity: 0.9809
  • Inclination: 31.26°
  • Longitude of Ascending Node: 95.63°
  • Argument of Periapsis: 314.5°
  • Mean Anomaly: 0.0°

Physical Characteristics

  • Diameter: ~3431.463 km

Derived Characteristics

  • Orbit Period: 276,000 days (755.65 years)
  • Avg. Orbit Speed: 3.27 km/s
  • Aphelion Distance: 164.18 AU
  • Perihelion Distance: 1.58 AU

Map Comparison

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Orbit Simulation

Sky Map

The position of C/1811 W1 (Pons) 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.