Key Facts
- Categorized as a Amor-class Asteroid
- Comparable in size to the U.S. Pentagon
- Will pass within 21,253,839 km of Earth in 2174
- Classified as a Near Earth Asteroid (NEA)
- Classified as a Potentially Hazardous Asteroid (PHA)
- See orbit simulation
Overview
138524 (2000 OJ8) is a mid-sized asteroid whose orbit approaches the orbit of Earth but does not cross it. NASA JPL has classified 2000 OJ8 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.
2000 OJ8 orbits the sun every 1,320 days (3.61 years), coming as close as 1.02 AU and reaching as far as 3.70 AU from the sun. Based on its brightness and the way it reflects light, 2000 OJ8 is probably between 1.118 to 2.501 kilometers in diameter, making it larger than 99% of asteroids, very roughly comparable in size to the U.S. Pentagon.
The rotation of 2000 OJ8 has been observed. It completes a rotation on its axis every 2.68 hours.
2000 OJ8's spectral type None (Tholen) / Sr (SMASSII) indicates that it is likely to contain and .
Close Approaches
2000 OJ8's orbit is 0.03 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.
2000 OJ8 has 1 close approaches predicted in the coming decades:
| Date | Distance from Earth (km) | Velocity (km/s) |
|---|---|---|
| Dec. 7, 2174 | 21,253,839 | 10.267 |
Images and Observations
2000 OJ8's orbit is determined by observations dating back to July 30, 2000. It was last officially observed on April 13, 2023. The IAU Minor Planet Center records 1,033 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 2000 OJ8:References
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or view a random objectOrbital Elements
- Epoch: 2460200.5 JD
- Semi-major axis: 2.358 AU
- Eccentricity: 0.5679
- Inclination: 6.25°
- Longitude of Ascending Node: 226.58°
- Argument of Periapsis: 181.24°
- Mean Anomaly: 99.08°
Physical Characteristics
- Diameter: ~1.444 km
- Magnitude: 16.88
- Spectral type (SMASS): Sr
Derived Characteristics
- Orbit Period: 1,320 days (3.61 years)
- Avg. Orbit Speed: 19.43 km/s
- Aphelion Distance: 3.70 AU
- Perihelion Distance: 1.02 AU
- Rotation Period: 2.68 hours
- Approx. Composition: and .
Map Comparison
Orbit Simulation
Sky Map
The position of 138524 (2000 OJ8) 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 2000 OJ8 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.
