Key Facts
- Categorized as a Apollo-class Asteroid
- Comparable in size to the Golden Gate Bridge
- Will pass within 20,625,931 km of Earth in 2191
- Classified as a Near Earth Asteroid (NEA)
- Classified as a Potentially Hazardous Asteroid (PHA)
- See orbit simulation
Overview
2020 SL1 is a mid-sized asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2020 SL1 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.
2020 SL1 orbits the sun every 1,460 days (4.00 years), coming as close as 0.91 AU and reaching as far as 4.12 AU from the sun. Based on its brightness and the way it reflects light, 2020 SL1 is probably between 0.841 to 1.879 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the Golden Gate Bridge.
Close Approaches
2020 SL1's orbit is 0.05 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.
2020 SL1 has 1 close approaches predicted in the coming decades:
| Date | Distance from Earth (km) | Velocity (km/s) |
|---|---|---|
| July 25, 2191 | 20,625,931 | 18.079 |
Images and Observations
2020 SL1's orbit is determined by observations dating back to Oct. 25, 2008. It was last officially observed on Nov. 7, 2020. The IAU Minor Planet Center records 44 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 2020 SL1:References
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or view a random objectOrbital Elements
- Epoch: 2460200.5 JD
- Semi-major axis: 2.517 AU
- Eccentricity: 0.638
- Inclination: 13.75°
- Longitude of Ascending Node: 275.2°
- Argument of Periapsis: 331.86°
- Mean Anomaly: 331.04°
Physical Characteristics
- Diameter: ~1.085 km
- Magnitude: 17.5
Derived Characteristics
- Orbit Period: 1,460 days (4.00 years)
- Avg. Orbit Speed: 18.76 km/s
- Aphelion Distance: 4.12 AU
- Perihelion Distance: 0.91 AU
Map Comparison
Orbit Simulation
Sky Map
The position of 2020 SL1 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 2020 SL1 to create an approximate landscape rendering with Mount Everest in the background. This approximation is built for full-resolution desktop browsers. Shape, color, and texture of asteroid are imagined.
