Key Facts
- Categorized as a Apollo-class Asteroid
- Comparable in size to a football field
- Will pass within 26,202,370 km of Earth in 2142
- Classified as a Near Earth Asteroid (NEA)
- Classified as a Potentially Hazardous Asteroid (PHA)
- See orbit simulation
Overview
85640 (1998 OX4) is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 1998 OX4 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.
1998 OX4 orbits the sun every 726 days (1.99 years), coming as close as 0.81 AU and reaching as far as 2.35 AU from the sun. Based on its brightness and the way it reflects light, 1998 OX4 is probably between 0.157 to 0.352 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a football field.
Close Approaches
1998 OX4'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.
1998 OX4 has 5 close approaches predicted in the coming decades:
| Date | Distance from Earth (km) | Velocity (km/s) |
|---|---|---|
| Feb. 2, 2142 | 26,202,370 | 17.399 |
| Jan. 30, 2144 | 15,724,469 | 15.282 |
| Jan. 25, 2146 | 6,368,727 | 13.419 |
| Jan. 22, 2148 | 296,229 | 12.295 |
| Sept. 14, 2198 | 11,198,633 | 13.296 |
Images and Observations
1998 OX4's orbit is determined by observations dating back to July 26, 1998. It was last officially observed on May 1, 2019. The IAU Minor Planet Center records 274 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 1998 OX4:References
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or view a random objectOrbital Elements
- Epoch: 2460200.5 JD
- Semi-major axis: 1.58 AU
- Eccentricity: 0.4858
- Inclination: 4.51°
- Longitude of Ascending Node: 299.58°
- Argument of Periapsis: 117.28°
- Mean Anomaly: 176.84°
Physical Characteristics
- Diameter: ~0.203 km
- Magnitude: 21.14
Derived Characteristics
- Orbit Period: 726 days (1.99 years)
- Avg. Orbit Speed: 23.68 km/s
- Aphelion Distance: 2.35 AU
- Perihelion Distance: 0.81 AU
Map Comparison
Orbit Simulation
Sky Map
The position of 85640 (1998 OX4) 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 1998 OX4 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.
