Key Facts
- Categorized as a Apollo-class Asteroid
- Comparable in size to the U.S. Capitol building
- Will pass within 27,487,779 km of Earth in 2050
- Classified as a Near Earth Asteroid (NEA)
- Classified as a Potentially Hazardous Asteroid (PHA)
- See orbit simulation
Overview
217430 (2005 SN25) is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2005 SN25 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.
2005 SN25 orbits the sun every 498 days (1.36 years), coming as close as 0.90 AU and reaching as far as 1.56 AU from the sun. Based on its brightness and the way it reflects light, 2005 SN25 is probably between 0.304 to 0.679 kilometers in diameter, making it larger than 90% of asteroids but tiny compared to large asteroids, very roughly comparable in size to the U.S. Capitol building.
Close Approaches
2005 SN25'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.
2005 SN25 has 7 close approaches predicted in the coming decades:
| Date | Distance from Earth (km) | Velocity (km/s) |
|---|---|---|
| Feb. 18, 2050 | 27,487,779 | 14.000 |
| Feb. 19, 2065 | 24,835,603 | 13.537 |
| Feb. 20, 2080 | 24,808,970 | 13.537 |
| Feb. 19, 2095 | 26,723,897 | 13.878 |
| April 19, 2159 | 29,309,007 | 8.237 |
| April 11, 2174 | 26,731,228 | 8.281 |
| April 7, 2189 | 25,443,386 | 8.282 |
Images and Observations
2005 SN25's orbit is determined by observations dating back to Oct. 26, 2001. It was last officially observed on Nov. 4, 2020. The IAU Minor Planet Center records 299 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 2005 SN25:References
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or view a random objectOrbital Elements
- Epoch: 2460200.5 JD
- Semi-major axis: 1.23 AU
- Eccentricity: 0.2705
- Inclination: 13.01°
- Longitude of Ascending Node: 168.3°
- Argument of Periapsis: 45.18°
- Mean Anomaly: 192.18°
Physical Characteristics
- Diameter: ~0.392 km
- Magnitude: 19.71
Derived Characteristics
- Orbit Period: 498 days (1.36 years)
- Avg. Orbit Speed: 26.87 km/s
- Aphelion Distance: 1.56 AU
- Perihelion Distance: 0.90 AU
Map Comparison
Orbit Simulation
Sky Map
The position of 217430 (2005 SN25) 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 2005 SN25 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.
