Key Facts


315898 (2008 QD4) is a large asteroid with an orbit between Jupiter and Neptune. NASA JPL has not classified 2008 QD4 as potentially hazardous because its orbit does not bring it close to Earth.

2008 QD4 orbits the sun every 8,840 days (24.20 years), coming as close as 5.41 AU and reaching as far as 11.32 AU from the sun. Based on its brightness and the way it reflects light, 2008 QD4 is probably between 13.885 to 31.048 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the city of Philadelphia.

No Close Approaches

2008 QD4's orbit is 4.65 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

2008 QD4's orbit is determined by observations dating back to Aug. 25, 2008. It was last officially observed on May 26, 2019. The IAU Minor Planet Center records 277 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 2008 QD4:



   or view a random object

Orbital Elements

  • Epoch: 2459800.5 JD
  • Semi-major axis: 8.365 AU
  • Eccentricity: 0.3527
  • Inclination: 42.09°
  • Longitude of Ascending Node: 344.79°
  • Argument of Periapsis: 68.22°
  • Mean Anomaly: 178.17°

Physical Characteristics

  • Diameter: ~17.926 km
  • Magnitude: 11.41

Derived Characteristics

  • Orbit Period: 8,840 days (24.20 years)
  • Avg. Orbit Speed: 10.29 km/s
  • Aphelion Distance: 11.32 AU
  • Perihelion Distance: 5.41 AU

Map Comparison

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Orbit Simulation

Sky Map

The position of 315898 (2008 QD4) 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.