Key Facts
- Categorized as a Aten-class Asteroid
- Comparable in size to a school bus or smaller
- Will pass within 17,488,435 km of Earth in 2020
- Classified as a Near Earth Asteroid (NEA)
- Not a Potentially Hazardous Object
- See orbit simulation
Overview
2021 UH2 is a very small asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 2021 UH2 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.
2021 UH2 orbits the sun every 355 days (0.97 years), coming as close as 0.81 AU and reaching as far as 1.15 AU from the sun. Based on its brightness and the way it reflects light, 2021 UH2 is probably between 0.017 to 0.075 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.
The rotation of 2021 UH2 has been observed. It completes a rotation on its axis every 3.80 hours.
Close Approaches
2021 UH2's orbit is 0.00 AU from Earth's orbit at its closest point. This means that its orbit is relatively close to Earth's orbit.
2021 UH2 has 36 close approaches predicted in the coming decades:
| Date | Distance from Earth (km) | Velocity (km/s) |
|---|---|---|
| Oct. 16, 2020 | 17,488,435 | 9.137 |
| Oct. 13, 2021 | 5,970,540 | 4.459 |
| Aug. 13, 2022 | 25,366,597 | 5.080 |
| Dec. 1, 2022 | 22,503,003 | 4.631 |
| Jan. 7, 2024 | 24,614,426 | 4.969 |
| May 29, 2024 | 28,416,995 | 5.918 |
| Feb. 20, 2025 | 15,375,861 | 3.666 |
| March 10, 2026 | 8,505,946 | 7.341 |
| Oct. 15, 2055 | 4,132,967 | 6.431 |
| Sept. 12, 2056 | 19,000,029 | 3.263 |
| Nov. 8, 2056 | 17,220,965 | 3.863 |
| July 25, 2057 | 28,461,432 | 5.927 |
| Dec. 18, 2057 | 24,863,270 | 4.972 |
| Jan. 20, 2059 | 23,130,006 | 4.720 |
| May 16, 2059 | 25,960,427 | 5.266 |
| March 10, 2060 | 9,520,132 | 3.774 |
| March 10, 2061 | 13,228,992 | 8.281 |
| Oct. 15, 2093 | 11,279,028 | 7.854 |
| Oct. 19, 2094 | 11,336,443 | 3.538 |
| Aug. 6, 2095 | 26,621,212 | 5.425 |
| Dec. 8, 2095 | 23,631,934 | 4.774 |
| Jan. 10, 2097 | 24,506,711 | 4.935 |
| May 28, 2097 | 27,889,112 | 5.807 |
| Feb. 21, 2098 | 15,492,413 | 3.648 |
| March 12, 2099 | 6,631,996 | 6.948 |
| Oct. 18, 2129 | 16,627,947 | 8.951 |
| Oct. 16, 2130 | 8,005,666 | 4.035 |
| Aug. 10, 2131 | 26,380,784 | 5.346 |
| Dec. 8, 2131 | 23,188,542 | 4.732 |
| Jan. 14, 2133 | 23,851,945 | 4.851 |
| May 24, 2133 | 27,323,153 | 5.620 |
| March 8, 2134 | 11,151,725 | 3.551 |
| March 11, 2135 | 13,938,019 | 8.417 |
| Oct. 18, 2164 | 17,117,009 | 9.048 |
| March 10, 2169 | 9,157,722 | 3.822 |
| March 9, 2170 | 16,442,581 | 8.927 |
Images and Observations
2021 UH2's orbit is determined by observations dating back to Oct. 27, 2021. It was last officially observed on Dec. 20, 2022. The IAU Minor Planet Center records 124 observations used to determine its orbit.
Accessibility and Exploration
2021 UH2 can be reached with a journey of 386 days. This trajectory would require a delta-v of 5.397 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 949,932 potential trajectories and launch windows to this asteroid.
See more at the NHATS Mission Trajectories table for 2021 UH2.
Similar Objects
These objects have orbits that share similar characteristics to the orbit of 2021 UH2:References
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or view a random objectOrbital Elements
- Epoch: 2460200.5 JD
- Semi-major axis: 0.9818 AU
- Eccentricity: 0.1721
- Inclination: 0.28°
- Longitude of Ascending Node: 313.49°
- Argument of Periapsis: 321.37°
- Mean Anomaly: 76.52°
Physical Characteristics
- Diameter: ~0.046 km
- Magnitude: 25.08
Derived Characteristics
- Orbit Period: 355 days (0.97 years)
- Avg. Orbit Speed: 30.09 km/s
- Aphelion Distance: 1.15 AU
- Perihelion Distance: 0.81 AU
- Rotation Period: 3.80 hours
Map Comparison
Orbit Simulation
Sky Map
The position of 2021 UH2 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 2021 UH2 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.
