Key Facts

  • Categorized as a Aten-class Asteroid
  • Comparable in size to a school bus or smaller
  • Will pass within 15,883,397 km of Earth in 2019
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

2005 RB3 is a very small asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 2005 RB3 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.

2005 RB3 orbits the sun every 300 days (0.82 years), coming as close as 0.53 AU and reaching as far as 1.22 AU from the sun. Based on its brightness and the way it reflects light, 2005 RB3 is probably between 0.080 to 0.179 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.

Close Approaches

2005 RB3's orbit is 0.05 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.

2005 RB3 has 17 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Sept. 9, 2019 15,883,397 21.034
Sept. 10, 2028 21,420,502 17.978
Sept. 10, 2042 7,327,795 19.391
Sept. 8, 2056 21,777,988 21.873
Sept. 11, 2065 14,018,880 18.452
Sept. 10, 2079 11,940,076 20.468
Sept. 10, 2088 22,936,669 17.904
Sept. 12, 2102 7,752,293 19.223
Sept. 10, 2116 15,927,179 21.030
Sept. 12, 2125 21,660,271 17.954
Sept. 12, 2139 7,494,994 19.326
Sept. 9, 2153 20,523,138 21.672
Sept. 12, 2162 15,504,920 18.343
Sept. 11, 2176 10,315,354 20.203
Sept. 12, 2185 25,846,624 17.763
Sept. 8, 2190 29,469,933 22.966
Sept. 13, 2199 10,084,200 18.848

Images and Observations

2005 RB3's orbit is determined by observations dating back to Sept. 3, 2005. It was last officially observed on Aug. 28, 2019. The IAU Minor Planet Center records 103 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 2005 RB3:

References

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Orbital Elements

  • Epoch: 2458600.5 JD
  • Semi-major axis: 0.877717371586 AU
  • Eccentricity: 0.393681392998
  • Inclination: 36.1047937269°
  • Longitude of Ascending Node: 165.848232646°
  • Argument of Periapsis: 320.380044216°
  • Mean Anomaly: 103.489062014°

Physical Characteristics

  • Diameter: ~0.104 km
  • Magnitude: 22.6

Derived Characteristics

  • Orbit Period: 300 days (0.82 years)
  • Avg. Orbit Speed: 31.79 km/s
  • Aphelion Distance: 1.22 AU
  • Perihelion Distance: 0.53 AU

Size Comparison

Orbit Simulation

Sky Map

The position of 2005 RB3 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.