Key Facts
- Categorized as a Apollo-class Asteroid
- Comparable in size to a school bus or smaller
- Will pass within 4,392,796 km of Earth in 2020
- Classified as a Near Earth Asteroid (NEA)
- Not a Potentially Hazardous Object
- See orbit simulation
Overview
2018 AL12 is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2018 AL12 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 AL12 orbits the sun every 735 days (2.01 years), coming as close as 0.60 AU and reaching as far as 2.59 AU from the sun. Based on its brightness and the way it reflects light, 2018 AL12 is probably between 0.029 to 0.065 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.
Close Approaches
2018 AL12's orbit is 0.00 AU from Earth's orbit at its closest point. This means that its orbit is relatively close to Earth's orbit.
2018 AL12 has 5 close approaches predicted in the coming decades:
| Date | Distance from Earth (km) | Velocity (km/s) |
|---|---|---|
| Jan. 29, 2020 | 4,392,796 | 18.175 |
| Aug. 1, 2060 | 5,694,185 | 17.973 |
| Aug. 5, 2062 | 2,093,498 | 19.472 |
| Aug. 9, 2064 | 15,775,861 | 22.165 |
| Feb. 1, 2157 | 7,366,772 | 17.603 |
NASA Sentry has assessed impact risk for 3 very close approach scenarios. Here are the top scenarios ordered by probability of impact:
| Date | Probability of Impact (%) | Impact Energy (Mt) |
|---|---|---|
| Aug. 7, 2119 | 0.00001 | 3.575 |
| Aug. 6, 2121 | 0.00000 | 3.559 |
| Aug. 7, 2115 | 0.00000 | 3.564 |
Images and Observations
2018 AL12's orbit is determined by observations dating back to Jan. 14, 2018. It was last officially observed on Jan. 25, 2018. The IAU Minor Planet Center records 34 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 AL12:References
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or view a random objectOrbital Elements
- Epoch: 2458134.5 JD
- Semi-major axis: 1.594 AU
- Eccentricity: 0.6233
- Inclination: 2.35°
- Longitude of Ascending Node: 317.45°
- Argument of Periapsis: 260.34°
- Mean Anomaly: 331.13°
Physical Characteristics
- Diameter: ~0.038 km
- Magnitude: 24.8
Derived Characteristics
- Orbit Period: 735 days (2.01 years)
- Avg. Orbit Speed: 23.59 km/s
- Aphelion Distance: 2.59 AU
- Perihelion Distance: 0.60 AU
Map Comparison
Orbit Simulation
Sky Map
The position of 2018 AL12 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 AL12 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.
