2023 HB4 is a very small asteroid whose orbit could bring it in close proximity to Earth. NASA JPL has classified 2023 HB4 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.
2023 HB4 orbits the sun every 220 days (0.60 years), coming as close as 0.38 AU and reaching as far as 1.04 AU from the sun. Based on its brightness and the way it reflects light, 2023 HB4 is probably between 0.011 to 0.025 kilometers in diameter, making it a small to average asteroid, very roughly comparable in size to a school bus or smaller.
2023 HB4'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.
2023 HB4 has 17 close approaches predicted in the coming decades:
| Date | Distance from Earth (km) | Velocity (km/s) |
|---|---|---|
| April 26, 2020 | 3,679,391 | 10.412 |
| April 24, 2023 | 969,235 | 9.585 |
| April 12, 2026 | 6,434,151 | 8.723 |
| March 28, 2029 | 7,458,808 | 8.820 |
| March 17, 2032 | 8,696,197 | 10.173 |
| March 15, 2035 | 17,839,205 | 12.841 |
| April 29, 2055 | 17,292,760 | 13.461 |
| April 27, 2058 | 5,347,753 | 10.758 |
| April 21, 2061 | 2,898,249 | 9.198 |
| April 5, 2064 | 7,371,052 | 8.655 |
| March 22, 2067 | 7,193,219 | 9.297 |
| March 16, 2070 | 12,848,607 | 11.517 |
| March 15, 2073 | 25,429,694 | 14.746 |
| April 29, 2090 | 16,896,166 | 13.367 |
| April 5, 2099 | 7,375,647 | 8.659 |
| March 16, 2105 | 13,087,789 | 11.601 |
| April 6, 2134 | 7,294,692 | 8.667 |
2023 HB4's orbit is determined by observations dating back to April 23, 2023. It was last officially observed on April 24, 2023. The IAU Minor Planet Center records 71 observations used to determine its orbit.
The position of 2023 HB4 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.