Key Facts


2012 YU23 is a mid-sized asteroid that orbits between Mars and Jupiter in the outer reaches of the main asteroid belt. NASA JPL has not classified 2012 YU23 as potentially hazardous because its orbit does not bring it close to Earth.

2012 YU23 orbits the sun every 3,290 days (9.01 years), coming as close as 2.39 AU and reaching as far as 6.26 AU from the sun. Based on its brightness and the way it reflects light, 2012 YU23 is probably between 1.314 to 2.938 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to Mount Everest.

No Close Approaches

2012 YU23's orbit is 1.42 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

2012 YU23's orbit is determined by observations dating back to Dec. 18, 2012. It was last officially observed on March 7, 2022. The IAU Minor Planet Center records 115 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 2012 YU23:



   or view a random object

Orbital Elements

  • Epoch: 2459800.5 JD
  • Semi-major axis: 4.329 AU
  • Eccentricity: 0.4471
  • Inclination: 14.28°
  • Longitude of Ascending Node: 266.46°
  • Argument of Periapsis: 146.58°
  • Mean Anomaly: 30.19°

Physical Characteristics

  • Diameter: ~1.696 km
  • Magnitude: 16.53

Derived Characteristics

  • Orbit Period: 3,290 days (9.01 years)
  • Avg. Orbit Speed: 14.31 km/s
  • Aphelion Distance: 6.26 AU
  • Perihelion Distance: 2.39 AU

Map Comparison

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Orbit Simulation

Sky Map

The position of 2012 YU23 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 2012 YU23 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.