Key Facts
- Categorized as a Apollo-class Asteroid
- Comparable in size to the U.S. Capitol building (0.38 km diameter)
- Will pass within 3,108,396 km of Earth in 2025
- Classified as a Near Earth Asteroid (NEA)
- Classified as a Potentially Hazardous Asteroid (PHA)
- See orbit simulation
Overview
1998 SH2 is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 1998 SH2 as a "Potentially Hazardous Asteroid" due to its predicted close pass(es) with Earth.
1998 SH2 orbits the sun every 1,660 days (4.54 years), coming as close as 0.79 AU and reaching as far as 4.70 AU from the sun. Its orbit is highly elliptical. 1998 SH2 is about 0.4 kilometers in diameter, making it larger than 90% of asteroids but tiny compared to large asteroids, comparable in size to the U.S. Capitol building.
Close Approaches
1998 SH2's orbit is 0.02 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.
1998 SH2 has 10 close approaches predicted in the coming decades:
| Date | Distance from Earth (km) | Velocity (km/s) |
|---|---|---|
| Aug. 30, 2025 | 3,108,396 | 17.301 |
| Sept. 8, 2052 | 10,443,323 | 20.173 |
| Sept. 3, 2061 | 2,464,250 | 17.905 |
| April 4, 2079 | 22,520,114 | 24.079 |
| Sept. 5, 2092 | 8,058,358 | 17.792 |
| April 5, 2101 | 26,051,312 | 24.373 |
| Sept. 19, 2158 | 26,913,156 | 23.366 |
| Sept. 2, 2167 | 9,756,462 | 16.491 |
| Aug. 6, 2176 | 29,767,441 | 14.248 |
| May 17, 2194 | 20,764,300 | 13.870 |
Images and Observations
1998 SH2's orbit is determined by observations dating back to Sept. 17, 1998. It was last officially observed on Oct. 27, 2016. The IAU Minor Planet Center records 148 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 SH2:References
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or view a random objectOrbital Elements
- Epoch: 2460200.5 JD
- Semi-major axis: 2.742 AU
- Eccentricity: 0.7137
- Inclination: 2.4°
- Longitude of Ascending Node: 6.38°
- Argument of Periapsis: 268.43°
- Mean Anomaly: 212.93°
Physical Characteristics
- Diameter: 0.38300 km
- Magnitude: 20.8
- Albedo: 0.058
Derived Characteristics
- Orbit Period: 1,660 days (4.54 years)
- Avg. Orbit Speed: 17.97 km/s
- Aphelion Distance: 4.70 AU
- Perihelion Distance: 0.79 AU
Map Comparison
Orbit Simulation
Sky Map
The position of 1998 SH2 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 SH2 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.
