Key Facts
- Categorized as a Amor-class Asteroid
- Comparable in size to a school bus or smaller
- Will pass within 8,447,068 km of Earth in 2020
- Classified as a Near Earth Asteroid (NEA)
- Not a Potentially Hazardous Object
- See orbit simulation
Overview
2020 HJ is a very small asteroid whose orbit approaches the orbit of Earth but does not cross it. NASA JPL has classified 2020 HJ 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.
2020 HJ orbits the sun every 456 days (1.25 years), coming as close as 1.02 AU and reaching as far as 1.30 AU from the sun. Based on its brightness and the way it reflects light, 2020 HJ is probably between 0.015 to 0.068 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.
Close Approaches
2020 HJ's orbit is 0.06 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.
2020 HJ has 4 close approaches predicted in the coming decades:
| Date | Distance from Earth (km) | Velocity (km/s) |
|---|---|---|
| April 22, 2020 | 8,447,068 | 7.883 |
| April 21, 2025 | 14,998,400 | 8.885 |
| April 20, 2030 | 27,599,863 | 10.611 |
| April 23, 2091 | 8,460,060 | 7.661 |
Images and Observations
2020 HJ's orbit is determined by observations dating back to April 16, 2020. It was last officially observed on April 27, 2020. The IAU Minor Planet Center records 46 observations used to determine its orbit.
Accessibility and Exploration
2020 HJ can be reached with a journey of 362 days. This trajectory would require a delta-v of 11.272 km/s. To put this into perspective, the delta-v to launch a rocket to Low-Earth Orbit is 9.7 km/s. There are 111 potential trajectories and launch windows to this asteroid.
See more at the NHATS Mission Trajectories table for 2020 HJ.
Similar Objects
These objects have orbits that share similar characteristics to the orbit of 2020 HJ:References
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or view a random objectOrbital Elements
- Epoch: 2458958.5 JD
- Semi-major axis: 1.159 AU
- Eccentricity: 0.1205
- Inclination: 13.79°
- Longitude of Ascending Node: 207.58°
- Argument of Periapsis: 52.56°
- Mean Anomaly: 319.88°
Physical Characteristics
- Diameter: ~0.042 km
- Magnitude: 25.3
Derived Characteristics
- Orbit Period: 456 days (1.25 years)
- Avg. Orbit Speed: 27.65 km/s
- Aphelion Distance: 1.30 AU
- Perihelion Distance: 1.02 AU
Map Comparison
Orbit Simulation
Sky Map
The position of 2020 HJ 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 2020 HJ 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.
