Key Facts

Overview

P/2008 Y12 (SOHO) is a large comet whose orbit features a relatively short period, low inclination, and is controlled by Jupiter's gravitational effects. NASA JPL has classified SOHO as a "Near Earth Asteroid" due to its orbit's proximity to Earth, but it is not considered potentially hazardous because computer simulations have not indicated any imminent likelihood of future collision.

SOHO orbits the sun every 1,970 days (5.39 years), coming as close as 0.07 AU and reaching as far as 6.09 AU from the sun. Its orbit is highly elliptical. Based on its brightness and the way it reflects light, SOHO 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

SOHO's orbit is 0.04 AU from Earth's orbit at its closest point. This means that there is an 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

SOHO's orbit is determined by observations dating back to Dec. 21, 2008. It was last officially observed on May 17, 2014. The IAU Minor Planet Center records 76 observations used to determine its orbit.

Accessibility and Exploration

This comet 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 SOHO:

References

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Orbital Elements

  • Epoch: 2455476.5 JD
  • Semi-major axis: 3.078 AU
  • Eccentricity: 0.9787
  • Inclination: 23.35°
  • Longitude of Ascending Node: 312.55°
  • Argument of Periapsis: 146.61°
  • Mean Anomaly: 119.27°

Physical Characteristics

  • Diameter: ~3431.463 km

Derived Characteristics

  • Orbit Period: 1,970 days (5.39 years)
  • Avg. Orbit Speed: 17.00 km/s
  • Aphelion Distance: 6.09 AU
  • Perihelion Distance: 0.07 AU

Size Comparison

Orbit Simulation

Sky Map

The position of P/2008 Y12 (SOHO) 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.