Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to Mount Everest (2.95 km diameter)
  • Will pass within 29,221,363 km of Earth in 2051
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

Cuno is a small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified Cuno as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.

Cuno orbits the sun every 1,020 days (2.79 years), coming as close as 0.73 AU and reaching as far as 3.24 AU from the sun. Cuno is about 2.9 kilometers in diameter, making it larger than most asteroids, comparable in size to Mount Everest.

The rotation of Cuno has been observed. It completes a rotation on its axis every 3.56 days.

Cuno's spectral type (Tholen) / Sq (SMASSII) indicates that it is likely to contain magnesium silicate and iron silicate.

Close Approaches

Cuno's orbit is 0.03 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.

Cuno has 11 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
June 9, 2051 29,221,363 22.117
Dec. 22, 2053 22,988,151 21.570
May 20, 2065 19,146,156 14.082
Jan. 8, 2093 12,608,706 14.869
June 3, 2104 14,677,836 18.571
May 21, 2118 19,860,474 13.903
Jan. 8, 2146 9,141,062 15.418
June 11, 2157 29,022,894 22.142
Dec. 27, 2159 18,220,613 20.607
May 28, 2171 13,705,452 15.445
Jan. 23, 2199 24,813,711 12.921

Images and Observations

Cuno's orbit is determined by observations dating back to June 5, 1959. It was last officially observed on Oct. 19, 2019. The IAU Minor Planet Center records 2,223 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 Cuno:

References

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Orbital Elements

  • Epoch: 2458600.5 JD
  • Semi-major axis: 1.98271874299 AU
  • Eccentricity: 0.634286700654
  • Inclination: 6.70416497722°
  • Longitude of Ascending Node: 294.873999332°
  • Argument of Periapsis: 236.358783099°
  • Mean Anomaly: 190.136677338°

Physical Characteristics

  • Diameter: 2.94500 km
  • Magnitude: 14.4
  • Albedo: 0.097
  • Spectral type (SMASS): Sq

Derived Characteristics

  • Orbit Period: 1,020 days (2.79 years)
  • Avg. Orbit Speed: 21.15 km/s
  • Aphelion Distance: 3.24 AU
  • Perihelion Distance: 0.73 AU
  • Rotation Period: 3.56 days
  • Approx. Composition: magnesium silicate and iron silicate.

Size Comparison

Orbit Simulation

Sky Map

The position of Cuno 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.