| Date | Miss Distance | Speed |
|---|---|---|
| December 26, 1904 | 0.0675 AU (10.1 million km) | 15.2 km/s |
| July 12, 1909 | 0.0544 AU (8.1 million km) | 13.3 km/s |
| March 26, 1917 | 0.1845 AU (27.6 million km) | 11.0 km/s |
| March 29, 1929 | 0.1678 AU (25.1 million km) | 11.5 km/s |
| July 16, 1933 | 0.0975 AU (14.6 million km) | 19.2 km/s |
| October 28, 1938 | 0.0677 AU (10.1 million km) | 14.9 km/s |
| April 2, 1941 | 0.1475 AU (22.1 million km) | 12.4 km/s |
| May 13, 1943 | 0.0621 AU (9.3 million km) | 12.9 km/s |
| April 2, 1953 | 0.1445 AU (21.6 million km) | 12.5 km/s |
| October 29, 1962 | 0.0963 AU (14.4 million km) | 11.9 km/s |
| April 2, 1965 | 0.1470 AU (22.0 million km) | 12.4 km/s |
| May 13, 1967 | 0.0336 AU (5.0 million km) | 15.1 km/s |
| August 23, 1972 | 0.1289 AU (19.3 million km) | 19.9 km/s |
| April 2, 1977 | 0.1457 AU (21.8 million km) | 12.5 km/s |
| November 1, 1986 | 0.1353 AU (20.2 million km) | 9.8 km/s |
| April 1, 1989 | 0.1516 AU (22.7 million km) | 12.2 km/s |
| May 13, 1991 | 0.0562 AU (8.4 million km) | 17.1 km/s |
| August 23, 1996 | 0.0887 AU (13.3 million km) | 17.5 km/s |
| March 2, 2001 | 0.1245 AU (18.6 million km) | 10.5 km/s |
| April 3, 2001 | 0.1465 AU (21.9 million km) | 12.5 km/s |
| April 1, 2013 | 0.1528 AU (22.9 million km) | 12.1 km/s |
| May 13, 2015 | 0.1058 AU (15.8 million km) | 19.6 km/s |
| August 22, 2020 | 0.0704 AU (10.5 million km) | 15.6 km/s |
| March 4, 2025 | 0.0954 AU (14.3 million km) | 11.4 km/s |
| April 1, 2025 | 0.1568 AU (23.5 million km) | 12.0 km/s |
| March 28, 2037 | 0.1796 AU (26.9 million km) | 11.2 km/s |
| May 10, 2039 | 0.1022 AU (15.3 million km) | 19.4 km/s |
| August 19, 2044 | 0.0760 AU (11.4 million km) | 16.3 km/s |
| February 25, 2049 | 0.1203 AU (18.0 million km) | 10.6 km/s |
| May 5, 2063 | 0.0584 AU (8.7 million km) | 17.3 km/s |
| August 14, 2068 | 0.1001 AU (15.0 million km) | 18.2 km/s |
| September 7, 2070 | 0.1893 AU (28.3 million km) | 9.7 km/s |
| February 15, 2073 | 0.1450 AU (21.7 million km) | 10.5 km/s |
| September 8, 2082 | 0.1643 AU (24.6 million km) | 10.2 km/s |
| October 25, 2082 | 0.1481 AU (22.2 million km) | 9.5 km/s |
| May 3, 2087 | 0.0686 AU (10.3 million km) | 17.8 km/s |
| August 13, 2092 | 0.0822 AU (12.3 million km) | 16.9 km/s |
| September 8, 2094 | 0.1717 AU (25.7 million km) | 10.1 km/s |
| February 22, 2097 | 0.1103 AU (16.5 million km) | 10.9 km/s |
| September 9, 2106 | 0.1711 AU (25.6 million km) | 10.1 km/s |
| May 4, 2111 | 0.1383 AU (20.7 million km) | 21.1 km/s |
| August 15, 2116 | 0.0755 AU (11.3 million km) | 13.7 km/s |
| September 9, 2118 | 0.1854 AU (27.7 million km) | 9.8 km/s |
| February 27, 2121 | 0.0427 AU (6.4 million km) | 13.9 km/s |
| September 9, 2130 | 0.1857 AU (27.8 million km) | 9.8 km/s |
| August 16, 2140 | 0.1106 AU (16.5 million km) | 11.1 km/s |
| September 9, 2142 | 0.1835 AU (27.5 million km) | 9.9 km/s |
| February 28, 2145 | 0.0387 AU (5.8 million km) | 16.1 km/s |
| June 12, 2150 | 0.0926 AU (13.9 million km) | 17.6 km/s |
| December 22, 2154 | 0.1117 AU (16.7 million km) | 10.8 km/s |
| March 26, 2169 | 0.1985 AU (29.7 million km) | 10.7 km/s |
| June 16, 2174 | 0.1036 AU (15.5 million km) | 11.6 km/s |
| December 30, 2178 | 0.0394 AU (5.9 million km) | 16.2 km/s |
| April 1, 2181 | 0.1687 AU (25.2 million km) | 11.6 km/s |
| April 13, 2184 | 0.0830 AU (12.4 million km) | 16.8 km/s |
| October 26, 2188 | 0.0855 AU (12.8 million km) | 11.8 km/s |
| August 31, 2189 | 0.1944 AU (29.1 million km) | 19.7 km/s |
| April 6, 2193 | 0.1408 AU (21.1 million km) | 13.1 km/s |
4034 Vishnu (1986 PA) 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.
Asteroid member of the Apollo group of asteroids
4034 Vishnu is a rare-type asteroid classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 420 meters in diameter. It was discovered on 2 August 1986, by American astronomer Eleanor Helin at Palomar Observatory in California, United States. It is named after the Hindu deity Vishnu.
4034 Vishnu (1986 PA) 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 4034 Vishnu (1986 PA) is 0.1845 AU (27.6 million km) on March 26, 1917, at a speed of approximately 11.0 km/s.
4034 Vishnu (1986 PA) has an estimated diameter of 0.858 km (530โ1186 meters range). Its absolute magnitude (H) is 18.5, which NASA uses along with assumed albedo to estimate size.