Key Facts

Overview

15504 (1999 RG33) is a relatively small asteroid with an orbit between Jupiter and Neptune. NASA JPL has not classified 1999 RG33 as potentially hazardous because its orbit does not bring it close to Earth.

1999 RG33 orbits the sun every 10,501 days (28.75 years), coming as close as 2.12 AU and reaching as far as 16.65 AU from the sun. Its orbit is highly elliptical. Based on its brightness and the way it reflects light, 1999 RG33 is probably between 10.105 to 22.596 kilometers in diameter, making it larger than most asteroids, very roughly comparable in size to the city of Cleveland, Ohio.

No Close Approaches

1999 RG33's orbit is 1.41 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

1999 RG33's orbit is determined by observations dating back to May 12, 1996. It was last officially observed on Dec. 22, 2000. The IAU Minor Planet Center records 138 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 1999 RG33:

References

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Orbital Elements

  • Epoch: 2458600.5 JD
  • Semi-major axis: 9.38450490183 AU
  • Eccentricity: 0.773820755971
  • Inclination: 34.9066187763°
  • Longitude of Ascending Node: 23.6042702183°
  • Argument of Periapsis: 273.664755735°
  • Mean Anomaly: 260.155667496°

Physical Characteristics

  • Diameter: ~13.046 km
  • Magnitude: 12.1

Derived Characteristics

  • Orbit Period: 10,501 days (28.75 years)
  • Avg. Orbit Speed: 9.72 km/s
  • Aphelion Distance: 16.65 AU
  • Perihelion Distance: 2.12 AU

Size Comparison

Orbit Simulation

Sky Map

The position of 15504 (1999 RG33) 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.