Key Facts

  • Categorized as a Aten-class Asteroid
  • Comparable in size to the U.S. Capitol building
  • Will pass within 12,854,080 km of Earth in 2019
  • Classified as a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Object
  • See orbit simulation

Overview

2018 RO5 is a very small asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 2018 RO5 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.

2018 RO5 orbits the sun every 361 days (0.99 years), coming as close as 0.76 AU and reaching as far as 1.22 AU from the sun. Based on its brightness and the way it reflects light, 2018 RO5 is probably between 0.130 to 0.590 kilometers in diameter, making it small in absolute terms, but larger than 90% of asteroids, very roughly comparable in size to the U.S. Capitol building.

Close Approaches

2018 RO5'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.

2018 RO5 has 24 close approaches predicted in the coming decades:

Date Distance from Earth (km) Velocity (km/s)
Sept. 10, 2019 12,854,080 5.046
Aug. 9, 2020 24,497,174 4.254
Sept. 30, 2020 22,750,793 4.861
Oct. 18, 2021 29,128,462 5.652
Jan. 5, 2028 27,416,696 5.387
March 27, 2028 28,434,117 5.915
Jan. 27, 2029 19,763,866 4.395
Feb. 8, 2030 9,036,286 5.768
Feb. 7, 2031 4,128,680 7.900
Feb. 4, 2032 15,075,444 10.398
Jan. 31, 2033 27,827,311 13.021
Sept. 15, 2082 21,018,282 11.528
Sept. 12, 2083 5,320,841 8.437
Sept. 9, 2084 8,437,388 5.784
Sept. 29, 2085 21,779,984 4.771
Oct. 22, 2086 29,753,864 5.743
Dec. 29, 2090 29,227,708 5.663
Feb. 8, 2093 6,594,581 6.244
Feb. 5, 2094 9,166,596 9.088
Feb. 1, 2095 23,863,529 12.154
Sept. 16, 2142 19,854,380 11.300
Sept. 13, 2143 5,421,134 8.467
Sept. 10, 2144 6,992,433 6.051
Sept. 24, 2145 19,814,237 4.599

Images and Observations

2018 RO5's orbit is determined by observations dating back to Sept. 12, 2018. It was last officially observed on Oct. 6, 2018. The IAU Minor Planet Center records 102 observations used to determine its orbit.

Accessibility and Exploration

2018 RO5 can be reached with a journey of 394 days. This trajectory would require a delta-v of 7.301 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 417,974 potential trajectories and launch windows to this asteroid.

See more at the NHATS Mission Trajectories table for 2018 RO5.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of 2018 RO5:

References

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Orbital Elements

  • Epoch: 2459000.5 JD
  • Semi-major axis: 0.9918 AU
  • Eccentricity: 0.2316
  • Inclination: 2.69°
  • Longitude of Ascending Node: 347.87°
  • Argument of Periapsis: 252.17°
  • Mean Anomaly: 348.76°

Physical Characteristics

  • Diameter: ~0.360 km
  • Magnitude: 25.6

Derived Characteristics

  • Orbit Period: 361 days (0.99 years)
  • Avg. Orbit Speed: 29.89 km/s
  • Aphelion Distance: 1.22 AU
  • Perihelion Distance: 0.76 AU

Map Comparison

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Orbit Simulation

Sky Map

The position of 2018 RO5 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 2018 RO5 to create an approximate landscape rendering. The approximation is built for full-resolution desktop browsers. Shape, color, and texture of asteroid are imagined.