| Date | Miss Distance | Speed |
|---|---|---|
| June 12, 1905 | 0.0681 AU (10.2 million km) | 11.4 km/s |
| May 18, 1911 | 0.0647 AU (9.7 million km) | 16.7 km/s |
| April 26, 1925 | 0.0814 AU (12.2 million km) | 16.4 km/s |
| April 29, 1934 | 0.1557 AU (23.3 million km) | 9.9 km/s |
| June 2, 1963 | 0.0982 AU (14.7 million km) | 10.0 km/s |
| June 23, 1976 | 1.8930 AU (283.2 million km) | 2.5 km/s |
| January 22, 1988 | 1.8258 AU (273.1 million km) | 2.5 km/s |
| June 21, 1995 | 0.0797 AU (11.9 million km) | 13.5 km/s |
| March 5, 1998 | 0.1130 AU (16.9 million km) | 13.3 km/s |
| August 22, 1999 | 1.8898 AU (282.7 million km) | 2.6 km/s |
| June 12, 2027 | 0.0677 AU (10.1 million km) | 11.1 km/s |
| April 10, 2056 | 0.1509 AU (22.6 million km) | 9.8 km/s |
| June 25, 2082 | 0.0829 AU (12.4 million km) | 14.3 km/s |
| March 4, 2085 | 0.1178 AU (17.6 million km) | 13.8 km/s |
| February 24, 2107 | 1.9648 AU (293.9 million km) | 2.6 km/s |
| June 1, 2114 | 0.1004 AU (15.0 million km) | 9.8 km/s |
| September 20, 2118 | 1.8407 AU (275.4 million km) | 2.5 km/s |
| April 19, 2130 | 1.8436 AU (275.8 million km) | 2.6 km/s |
| November 9, 2141 | 1.9837 AU (296.8 million km) | 2.6 km/s |
| June 13, 2146 | 0.0630 AU (9.4 million km) | 10.9 km/s |
| May 18, 2175 | 0.1401 AU (21.0 million km) | 9.8 km/s |
| June 18, 2178 | 0.0357 AU (5.3 million km) | 16.2 km/s |
20236 (1998 BZ7) is classified as a Potentially Hazardous Asteroid (PHA) because it is estimated to be larger than 140 meters and its orbit comes within 0.05 AU of Earth. NASA continuously monitors this object for any future impact risk. Current data does not indicate a confirmed impact event.
20236 (1998 BZ7) is classified as a potentially hazardous asteroid (PHA) by NASA. This means it is large enough and its orbit brings it close enough to Earth to warrant close monitoring. However, a PHA classification does not mean an impact is imminent.
The closest recorded Earth approach of 20236 (1998 BZ7) is 0.0681 AU (10.2 million km) on June 12, 1905, at a speed of approximately 11.4 km/s.
20236 (1998 BZ7) has an estimated diameter of 1.23 km (760โ1698 meters range). Its absolute magnitude (H) is 17.72, which NASA uses along with assumed albedo to estimate size.