Key Facts
- Categorized as a Apollo-class Asteroid
- Comparable in size to the U.S. Capitol building
- Will pass within 2,155,031 km of Earth in 2028
- Classified as a Near Earth Asteroid (NEA)
- Classified as a Potentially Hazardous Asteroid (PHA)
- See orbit simulation
Overview
2018 GG2 is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2018 GG2 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.
2018 GG2 orbits the sun every 1,220 days (3.34 years), coming as close as 0.65 AU and reaching as far as 3.82 AU from the sun. Its orbit is highly elliptical. Based on its brightness and the way it reflects light, 2018 GG2 is probably between 0.374 to 0.836 kilometers in diameter, making it larger than 90% of asteroids but tiny compared to large asteroids, very roughly comparable in size to the U.S. Capitol building.
Close Approaches
2018 GG2'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 GG2 has 7 close approaches predicted in the coming decades:
| Date | Distance from Earth (km) | Velocity (km/s) |
|---|---|---|
| April 3, 2028 | 2,155,031 | 29.484 |
| April 6, 2038 | 6,459,203 | 30.623 |
| April 11, 2048 | 22,518,961 | 32.915 |
| Oct. 13, 2094 | 25,194,989 | 30.108 |
| Oct. 18, 2104 | 27,510,783 | 27.235 |
| March 31, 2185 | 12,377,825 | 28.218 |
| April 5, 2195 | 4,170,480 | 30.354 |
Images and Observations
2018 GG2's orbit is determined by observations dating back to Sept. 24, 2017. It was last officially observed on May 23, 2018. The IAU Minor Planet Center records 149 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 GG2:References
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or view a random objectOrbital Elements
- Epoch: 2460200.5 JD
- Semi-major axis: 2.236 AU
- Eccentricity: 0.7103
- Inclination: 43.32°
- Longitude of Ascending Node: 195.08°
- Argument of Periapsis: 278.48°
- Mean Anomaly: 242.9°
Physical Characteristics
- Diameter: ~0.482 km
- Magnitude: 19.26
Derived Characteristics
- Orbit Period: 1,220 days (3.34 years)
- Avg. Orbit Speed: 19.94 km/s
- Aphelion Distance: 3.82 AU
- Perihelion Distance: 0.65 AU
Map Comparison
Orbit Simulation
Sky Map
The position of 2018 GG2 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 GG2 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.
