Key Facts
- Categorized as a Amor-class Asteroid
- Comparable in size to the U.S. Capitol building
- Will pass within 12,122,940 km of Earth in 2020
- Classified as a Near Earth Asteroid (NEA)
- Not a Potentially Hazardous Object
- See orbit simulation
Overview
2012 KB4 is a very small asteroid whose orbit approaches the orbit of Earth but does not cross it. NASA JPL has classified 2012 KB4 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.
2012 KB4 orbits the sun every 417 days (1.14 years), coming as close as 1.03 AU and reaching as far as 1.16 AU from the sun. Based on its brightness and the way it reflects light, 2012 KB4 is probably between 0.150 to 0.680 kilometers in diameter, making it small in absolute terms, but larger than 90% of asteroids, very roughly comparable in size to the U.S. Capitol building.
Close Approaches
2012 KB4's orbit is 0.07 AU from Earth's orbit at its closest point. This means that there is an wide berth between this asteroid and Earth at all times.
2012 KB4 has 29 close approaches predicted in the coming decades:
| Date | Distance from Earth (km) | Velocity (km/s) |
|---|---|---|
| June 1, 2020 | 12,122,940 | 3.426 |
| Oct. 17, 2020 | 16,567,137 | 4.594 |
| May 21, 2028 | 15,564,837 | 3.447 |
| Oct. 12, 2028 | 21,945,598 | 5.485 |
| April 22, 2036 | 23,817,366 | 3.533 |
| Dec. 28, 2059 | 25,609,396 | 3.697 |
| June 27, 2067 | 24,347,657 | 6.067 |
| Nov. 27, 2067 | 17,450,954 | 3.627 |
| June 23, 2075 | 16,317,909 | 4.678 |
| Nov. 11, 2075 | 12,803,196 | 3.554 |
| June 23, 2083 | 16,575,118 | 4.705 |
| Nov. 11, 2083 | 12,780,349 | 3.552 |
| June 27, 2091 | 25,164,393 | 6.163 |
| Nov. 29, 2091 | 17,672,438 | 3.609 |
| Jan. 1, 2100 | 25,797,914 | 3.580 |
| March 25, 2116 | 28,237,580 | 3.337 |
| May 3, 2124 | 20,668,090 | 3.496 |
| May 27, 2132 | 13,629,239 | 3.423 |
| Oct. 16, 2132 | 19,013,440 | 5.034 |
| June 2, 2140 | 12,199,217 | 3.436 |
| Oct. 18, 2140 | 16,307,469 | 4.611 |
| May 23, 2148 | 15,286,849 | 3.454 |
| Oct. 14, 2148 | 21,340,087 | 5.438 |
| April 25, 2156 | 23,305,477 | 3.559 |
| Dec. 30, 2179 | 26,096,739 | 3.666 |
| June 29, 2187 | 25,067,199 | 6.158 |
| Nov. 29, 2187 | 17,841,361 | 3.626 |
| June 24, 2195 | 16,667,684 | 4.703 |
| Nov. 12, 2195 | 12,794,709 | 3.538 |
Images and Observations
2012 KB4's orbit is determined by observations dating back to May 17, 2012. It was last officially observed on May 19, 2020. The IAU Minor Planet Center records 32 observations used to determine its orbit.
Accessibility and Exploration
2012 KB4 can be reached with a journey of 378 days. This trajectory would require a delta-v of 6.465 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 325,978 potential trajectories and launch windows to this asteroid.
See more at the NHATS Mission Trajectories table for 2012 KB4.
Similar Objects
These objects have orbits that share similar characteristics to the orbit of 2012 KB4:References
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or view a random objectOrbital Elements
- Epoch: 2459000.5 JD
- Semi-major axis: 1.093 AU
- Eccentricity: 0.0609
- Inclination: 6.32°
- Longitude of Ascending Node: 60.48°
- Argument of Periapsis: 277.68°
- Mean Anomaly: 277.09°
Physical Characteristics
- Diameter: ~0.415 km
- Magnitude: 25.3
Derived Characteristics
- Orbit Period: 417 days (1.14 years)
- Avg. Orbit Speed: 28.52 km/s
- Aphelion Distance: 1.16 AU
- Perihelion Distance: 1.03 AU
Map Comparison
Orbit Simulation
Sky Map
The position of 2012 KB4 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 above comparison is an artistic rendering that uses available data on the diameter of 2012 KB4 to create an approximate landscape rendering. The approximation is built for full-resolution desktop browsers. Shape, color, and texture of asteroid are imagined.