2021 JB is a very small asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 2021 JB 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 JB orbits the sun every 328 days (0.90 years), coming as close as 0.66 AU and reaching as far as 1.20 AU from the sun. Based on its brightness and the way it reflects light, 2021 JB is probably between 0.008 to 0.036 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.
2021 JB's orbit is 0.01 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.
2021 JB has 25 close approaches predicted in the coming decades:
| Date | Distance from Earth (km) | Velocity (km/s) |
|---|---|---|
| April 28, 2021 | 2,225,397 | 8.146 |
| Sept. 2, 2022 | 18,810,826 | 6.260 |
| May 7, 2030 | 15,981,619 | 6.249 |
| Aug. 29, 2031 | 17,497,754 | 9.337 |
| June 6, 2039 | 28,190,987 | 6.538 |
| May 3, 2047 | 28,243,814 | 13.818 |
| April 28, 2056 | 2,822,001 | 8.815 |
| Sept. 3, 2057 | 21,310,877 | 5.431 |
| April 29, 2065 | 6,880,481 | 7.240 |
| Sept. 2, 2066 | 16,846,647 | 7.192 |
| May 14, 2074 | 19,991,874 | 6.145 |
| Aug. 28, 2075 | 20,371,297 | 10.485 |
| June 13, 2083 | 29,616,052 | 6.599 |
| May 3, 2091 | 27,833,486 | 13.720 |
| April 30, 2100 | 12,267,283 | 10.650 |
| Aug. 7, 2101 | 26,977,262 | 5.453 |
| Sept. 28, 2101 | 28,008,939 | 5.486 |
| April 29, 2109 | 2,109,831 | 8.115 |
| Sept. 3, 2110 | 17,522,858 | 6.853 |
| May 31, 2118 | 26,225,604 | 6.410 |
| May 2, 2126 | 22,042,496 | 12.571 |
| July 26, 2127 | 29,026,082 | 5.894 |
| May 7, 2135 | 14,890,817 | 6.261 |
| Aug. 29, 2136 | 18,483,372 | 9.792 |
| April 28, 2152 | 1,203,531 | 8.398 |
2021 JB's orbit is determined by observations dating back to May 1, 2021. It was last officially observed on May 8, 2021. The IAU Minor Planet Center records 41 observations used to determine its orbit.
2021 JB can be reached with a journey of 378 days. This trajectory would require a delta-v of 9.575 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 30,715 potential trajectories and launch windows to this asteroid.
See more at the NHATS Mission Trajectories table for 2021 JB.
The position of 2021 JB 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.