Key Facts
- Categorized as a Apollo-class Asteroid
- Comparable in size to a school bus or smaller
- Will pass within 16,612,460 km of Earth in 2026
- Classified as a Near Earth Asteroid (NEA)
- Not a Potentially Hazardous Object
- See orbit simulation
Overview
2018 HN is a very small asteroid whose orbit crosses the orbit of Earth. NASA JPL has classified 2018 HN as a "Near Earth Asteroid" due to its orbit's proximity to Earth, but it is not considered potentially hazardous because computer simulations have not indicated any imminent likelihood of future collision.
2018 HN orbits the sun every 494 days (1.35 years), coming as close as 0.86 AU and reaching as far as 1.59 AU from the sun. Based on its brightness and the way it reflects light, 2018 HN is probably between 0.027 to 0.061 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.
Close Approaches
2018 HN'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.
2018 HN has 7 close approaches predicted in the coming decades:
| Date | Distance from Earth (km) | Velocity (km/s) |
|---|---|---|
| Sept. 25, 2026 | 16,612,460 | 11.793 |
| April 14, 2041 | 17,740,099 | 12.981 |
| Sept. 20, 2049 | 13,512,838 | 8.671 |
| April 26, 2091 | 9,106,863 | 8.460 |
| Sept. 20, 2118 | 16,714,691 | 7.756 |
| April 15, 2133 | 20,546,286 | 13.508 |
| Sept. 24, 2141 | 12,395,674 | 10.432 |
Images and Observations
2018 HN's orbit is determined by observations dating back to April 14, 2018. It was last officially observed on April 21, 2018. The IAU Minor Planet Center records 186 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 2018 HN:References
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or view a random objectOrbital Elements
- Epoch: 2460200.5 JD
- Semi-major axis: 1.222 AU
- Eccentricity: 0.2994
- Inclination: 9.3°
- Longitude of Ascending Node: 205.07°
- Argument of Periapsis: 77.53°
- Mean Anomaly: 315.58°
Physical Characteristics
- Diameter: ~0.035 km
- Magnitude: 24.96
Derived Characteristics
- Orbit Period: 494 days (1.35 years)
- Avg. Orbit Speed: 26.91 km/s
- Aphelion Distance: 1.59 AU
- Perihelion Distance: 0.86 AU
Map Comparison
Orbit Simulation
Sky Map
The position of 2018 HN 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 2018 HN 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.
