Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to the Golden Gate Bridge (0.60 km diameter)
  • Will pass within 5,339,562 km of Earth in 2036
  • Classified as a Near Earth Asteroid (NEA)
  • Classified as a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

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

Adonis orbits the sun every 938 days (2.57 years), coming as close as 0.44 AU and reaching as far as 3.31 AU from the sun. Its orbit is highly elliptical. Adonis is about 0.6 kilometers in diameter, making it small in absolute terms, but larger than ~97% of asteroids, comparable in size to the Golden Gate Bridge.

Close Approaches

Adonis's orbit is 0.01 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.

Adonis has 10 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Feb. 7, 2036 5,339,562 23.772
July 16, 2043 22,324,131 20.407
July 1, 2061 18,585,269 28.391
Feb. 16, 2077 26,334,878 30.117
Feb. 1, 2095 22,972,492 20.170
July 10, 2102 2,921,267 24.576
Feb. 3, 2136 20,673,832 20.643
July 10, 2143 3,321,089 24.358
Feb. 9, 2177 3,362,503 24.104
July 14, 2184 13,492,597 22.197

Images and Observations

Adonis's orbit is determined by observations dating back to Feb. 12, 1936. It was last officially observed on April 11, 2018. The IAU Minor Planet Center records 130 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 Adonis:

References

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Orbital Elements

  • Epoch: 2459000.5 JD
  • Semi-major axis: 1.875 AU
  • Eccentricity: 0.764
  • Inclination: 1.32°
  • Longitude of Ascending Node: 349.49°
  • Argument of Periapsis: 43.61°
  • Mean Anomaly: 336.16°

Physical Characteristics

  • Diameter: 0.60000 km
  • Magnitude: 18.8

Derived Characteristics

  • Orbit Period: 938 days (2.57 years)
  • Avg. Orbit Speed: 21.75 km/s
  • Aphelion Distance: 3.31 AU
  • Perihelion Distance: 0.44 AU

Size Comparison

Orbit Simulation

Sky Map

The position of Adonis 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.