Key Facts
- Categorized as a Apollo-class Asteroid
- Comparable in size to the Golden Gate Bridge
- Will pass within 23,552,163 km of Earth in 2034
- Classified as a Near Earth Asteroid (NEA)
- Classified as a Potentially Hazardous Asteroid (PHA)
- See orbit simulation
Overview
170903 (2004 WS2) is a small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2004 WS2 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.
2004 WS2 orbits the sun every 564 days (1.54 years), coming as close as 0.53 AU and reaching as far as 2.14 AU from the sun. Based on its brightness and the way it reflects light, 2004 WS2 is probably between 0.601 to 1.343 kilometers in diameter, making it larger than ~97% of asteroids but small compared to large asteroids, very roughly comparable in size to the Golden Gate Bridge.
Close Approaches
2004 WS2'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.
2004 WS2 has 13 close approaches predicted in the coming decades:
| Date | Distance from Earth (km) | Velocity (km/s) |
|---|---|---|
| Aug. 5, 2034 | 23,552,163 | 23.111 |
| Aug. 3, 2051 | 17,689,850 | 21.487 |
| Jan. 4, 2059 | 13,902,001 | 16.945 |
| July 25, 2068 | 18,196,718 | 17.242 |
| Dec. 31, 2075 | 4,789,905 | 19.689 |
| July 19, 2085 | 29,425,714 | 14.547 |
| Dec. 26, 2092 | 19,085,729 | 23.213 |
| July 30, 2122 | 14,960,283 | 18.679 |
| Jan. 1, 2130 | 5,663,542 | 20.061 |
| July 26, 2159 | 22,168,256 | 16.229 |
| Jan. 8, 2170 | 21,883,662 | 15.310 |
| Aug. 4, 2182 | 17,037,653 | 21.089 |
| Dec. 26, 2189 | 23,724,595 | 24.136 |
Images and Observations
2004 WS2's orbit is determined by observations dating back to Oct. 28, 2002. It was last officially observed on Nov. 14, 2022. The IAU Minor Planet Center records 1,135 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 2004 WS2:References
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or view a random objectOrbital Elements
- Epoch: 2460200.5 JD
- Semi-major axis: 1.336 AU
- Eccentricity: 0.6034
- Inclination: 8.27°
- Longitude of Ascending Node: 87.68°
- Argument of Periapsis: 115.44°
- Mean Anomaly: 12.72°
Physical Characteristics
- Diameter: ~0.775 km
- Magnitude: 18.23
Derived Characteristics
- Orbit Period: 564 days (1.54 years)
- Avg. Orbit Speed: 25.77 km/s
- Aphelion Distance: 2.14 AU
- Perihelion Distance: 0.53 AU
Map Comparison
Orbit Simulation
Sky Map
The position of 170903 (2004 WS2) 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 2004 WS2 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.
