Key Facts

  • Categorized as a Apollo-class Asteroid
  • Comparable in size to a school bus or smaller
  • Will pass within 105,775 km of Earth in 2020
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

2020 RD4 is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2020 RD4 as a "Near Earth Asteroid" due to its orbit's proximity to Earth, but it is not considered potentially hazardous because computer simulations have not indicated any imminent likelihood of future collision.

2020 RD4 orbits the sun every 371 days (1.02 years), coming as close as 0.67 AU and reaching as far as 1.35 AU from the sun. Based on its brightness and the way it reflects light, 2020 RD4 is probably between 0.002 to 0.009 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.

Close Approaches

2020 RD4's orbit is 0.00 AU from Earth's orbit at its closest point. This means that its orbit is very close to Earth's orbit.

2020 RD4 has 10 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Sept. 14, 2020 105,775 10.208
Sept. 16, 2021 15,335,002 6.934
Aug. 31, 2022 29,444,590 6.258
April 29, 2031 27,223,937 5.912
April 16, 2032 12,428,074 7.567
April 20, 2033 5,515,095 10.557
April 25, 2034 21,168,002 13.972
Sept. 7, 2077 29,010,798 15.592
Sept. 11, 2078 14,202,323 12.623
Sept. 15, 2079 186,894 10.018

Images and Observations

2020 RD4's orbit is determined by observations dating back to Sept. 12, 2020. It was last officially observed on Sept. 14, 2020. The IAU Minor Planet Center records 27 observations used to determine its orbit.

Accessibility and Exploration

2020 RD4 can be reached with a journey of 426 days. This trajectory would require a delta-v of 9.351 km/s. To put this into perspective, the delta-v to launch a rocket to Low-Earth Orbit is 9.7 km/s. There are 21,265 potential trajectories and launch windows to this asteroid.

See more at the NHATS Mission Trajectories table for 2020 RD4.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of 2020 RD4:

References

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Orbital Elements

  • Epoch: 2459396.5 JD
  • Semi-major axis: 1.011 AU
  • Eccentricity: 0.3388
  • Inclination: 2.6°
  • Longitude of Ascending Node: 352.2°
  • Argument of Periapsis: 108.92°
  • Mean Anomaly: 210.65°

Physical Characteristics

  • Diameter: ~0.005 km
  • Magnitude: 29.7

Derived Characteristics

  • Orbit Period: 371 days (1.02 years)
  • Avg. Orbit Speed: 29.65 km/s
  • Aphelion Distance: 1.35 AU
  • Perihelion Distance: 0.67 AU

Map Comparison

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Orbit Simulation

Sky Map

The position of 2020 RD4 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.