2021 BW1 is a very small asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 2021 BW1 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 BW1 orbits the sun every 303 days (0.83 years), coming as close as 0.72 AU and reaching as far as 1.05 AU from the sun. Based on its brightness and the way it reflects light, 2021 BW1 is probably between 0.009 to 0.039 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.
2021 BW1's orbit is 0.00 AU from Earth's orbit at its closest point. This means that its orbit is very close to Earth's orbit.
2021 BW1 has 16 close approaches predicted in the coming decades:
| Date | Distance from Earth (km) | Velocity (km/s) |
|---|---|---|
| Jan. 20, 2021 | 8,621,810 | 3.969 |
| May 1, 2021 | 26,479,627 | 2.401 |
| March 10, 2026 | 5,455,679 | 4.112 |
| March 20, 2031 | 3,484,746 | 5.516 |
| March 19, 2036 | 26,071,667 | 10.458 |
| Dec. 23, 2049 | 9,608,951 | 6.997 |
| Jan. 9, 2055 | 6,676,299 | 3.984 |
| May 15, 2055 | 29,488,931 | 3.870 |
| March 12, 2060 | 4,794,994 | 4.196 |
| March 21, 2065 | 11,984,216 | 7.450 |
| March 20, 2070 | 28,055,548 | 10.880 |
| Dec. 23, 2088 | 21,650,420 | 9.612 |
| Dec. 22, 2093 | 9,284,241 | 6.965 |
| Dec. 23, 2098 | 4,393,241 | 5.963 |
| Dec. 24, 2103 | 18,194,363 | 8.880 |
| Dec. 25, 2188 | 13,795,435 | 7.946 |
2021 BW1's orbit is determined by observations dating back to Jan. 14, 2021. It was last officially observed on March 2, 2021. The IAU Minor Planet Center records 29 observations used to determine its orbit.
2021 BW1 can be reached with a journey of 306 days. This trajectory would require a delta-v of 6.424 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 329,990 potential trajectories and launch windows to this asteroid.
See more at the NHATS Mission Trajectories table for 2021 BW1.
The position of 2021 BW1 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.