Key Facts
- Categorized as a Apollo-class Asteroid
- Comparable in size to a basketball court
- Will pass within 7,940,836 km of Earth in 2021
- Classified as a Near Earth Asteroid (NEA)
- Classified as a Potentially Hazardous Asteroid (PHA)
- See orbit simulation
Overview
2018 RB is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2018 RB as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.
2018 RB orbits the sun every 995 days (2.72 years), coming as close as 0.52 AU and reaching as far as 3.38 AU from the sun. Its orbit is highly elliptical. Based on its brightness and the way it reflects light, 2018 RB is probably between 0.116 to 0.259 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a basketball court.
Close Approaches
2018 RB's orbit is 0.02 AU from Earth's orbit at its closest point. This means that there is a wide berth between this asteroid and Earth at all times.
2018 RB has 4 close approaches predicted in the coming decades:
| Date | Distance from Earth (km) | Velocity (km/s) |
|---|---|---|
| Feb. 8, 2021 | 7,940,836 | 22.208 |
| Aug. 29, 2048 | 11,729,638 | 25.438 |
| Aug. 23, 2089 | 7,170,645 | 21.898 |
| Feb. 12, 2092 | 12,530,261 | 20.893 |
Images and Observations
2018 RB's orbit is determined by observations dating back to Sept. 1, 2018. It was last officially observed on Feb. 5, 2021. The IAU Minor Planet Center records 253 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 2018 RB:References
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or view a random objectOrbital Elements
- Epoch: 2460200.5 JD
- Semi-major axis: 1.95 AU
- Eccentricity: 0.7326
- Inclination: 4.56°
- Longitude of Ascending Node: 349.18°
- Argument of Periapsis: 244.31°
- Mean Anomaly: 326.16°
Physical Characteristics
- Diameter: ~0.150 km
- Magnitude: 21.8
Derived Characteristics
- Orbit Period: 995 days (2.72 years)
- Avg. Orbit Speed: 21.32 km/s
- Aphelion Distance: 3.38 AU
- Perihelion Distance: 0.52 AU
Map Comparison
Orbit Simulation
Sky Map
The position of 2018 RB 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 below comparison is an artistic rendering that uses available data on the diameter of 2018 RB to create an approximate landscape rendering with New York City in the background. This approximation is built for full-resolution desktop browsers. Shape, color, and texture of asteroid are imagined.
