| Date | Miss Distance | Speed |
|---|---|---|
| December 11, 1907 | 0.0993 AU (14.9 million km) | 21.4 km/s |
| August 31, 1916 | 0.0420 AU (6.3 million km) | 18.4 km/s |
| February 11, 1918 | 0.1241 AU (18.6 million km) | 22.2 km/s |
| March 8, 1918 | 0.0952 AU (14.2 million km) | 16.2 km/s |
| November 28, 1926 | 0.1432 AU (21.4 million km) | 14.2 km/s |
| August 13, 1935 | 0.0259 AU (3.9 million km) | 17.8 km/s |
| September 8, 1935 | 0.1444 AU (21.6 million km) | 22.6 km/s |
| February 18, 1937 | 0.0415 AU (6.2 million km) | 17.5 km/s |
| November 18, 1945 | 0.1066 AU (15.9 million km) | 14.1 km/s |
| September 2, 1954 | 0.0374 AU (5.6 million km) | 15.5 km/s |
| September 5, 1961 | 0.0886 AU (13.3 million km) | 20.7 km/s |
| December 8, 1962 | 0.0250 AU (3.7 million km) | 15.1 km/s |
| February 16, 1963 | 0.0413 AU (6.2 million km) | 19.4 km/s |
| December 4, 1964 | 0.1106 AU (16.6 million km) | 19.1 km/s |
| August 29, 1973 | 0.1432 AU (21.4 million km) | 14.2 km/s |
| May 18, 1982 | 0.0692 AU (10.3 million km) | 20.0 km/s |
| August 24, 1987 | 0.1369 AU (20.5 million km) | 14.7 km/s |
| August 20, 1992 | 0.1048 AU (15.7 million km) | 14.3 km/s |
| May 27, 2001 | 0.0916 AU (13.7 million km) | 13.8 km/s |
| September 8, 2006 | 0.1464 AU (21.9 million km) | 22.6 km/s |
| February 19, 2008 | 0.0408 AU (6.1 million km) | 17.6 km/s |
| May 27, 2020 | 0.1463 AU (21.9 million km) | 14.2 km/s |
| February 19, 2029 | 0.0971 AU (14.5 million km) | 21.3 km/s |
| September 3, 2032 | 0.0629 AU (9.4 million km) | 19.8 km/s |
| February 15, 2034 | 0.0649 AU (9.7 million km) | 20.2 km/s |
| June 7, 2039 | 0.1363 AU (20.4 million km) | 13.3 km/s |
| March 12, 2048 | 0.0302 AU (4.5 million km) | 17.9 km/s |
| July 3, 2058 | 0.1376 AU (20.6 million km) | 13.4 km/s |
| September 5, 2058 | 0.0785 AU (11.7 million km) | 20.3 km/s |
| February 17, 2060 | 0.0369 AU (5.5 million km) | 19.2 km/s |
| April 13, 2067 | 0.1025 AU (15.3 million km) | 21.5 km/s |
| August 11, 2077 | 0.1466 AU (21.9 million km) | 14.2 km/s |
| September 11, 2084 | 0.1903 AU (28.5 million km) | 23.9 km/s |
| February 23, 2086 | 0.1011 AU (15.1 million km) | 15.6 km/s |
| August 21, 2091 | 0.1799 AU (26.9 million km) | 13.5 km/s |
| September 26, 2096 | 0.1173 AU (17.6 million km) | 13.8 km/s |
| January 17, 2107 | 0.1054 AU (15.8 million km) | 18.3 km/s |
| November 5, 2115 | 0.0632 AU (9.4 million km) | 14.5 km/s |
| September 1, 2117 | 0.0615 AU (9.2 million km) | 17.3 km/s |
| February 13, 2119 | 0.1444 AU (21.6 million km) | 22.7 km/s |
| February 13, 2126 | 0.0995 AU (14.9 million km) | 17.2 km/s |
| November 23, 2134 | 0.1006 AU (15.0 million km) | 13.8 km/s |
| September 24, 2139 | 0.0793 AU (11.9 million km) | 16.5 km/s |
| August 29, 2143 | 0.1005 AU (15.0 million km) | 15.9 km/s |
| March 5, 2145 | 0.1465 AU (21.9 million km) | 21.7 km/s |
| November 26, 2153 | 0.1459 AU (21.8 million km) | 14.2 km/s |
| August 20, 2162 | 0.0765 AU (11.4 million km) | 20.2 km/s |
| February 26, 2164 | 0.1080 AU (16.2 million km) | 15.4 km/s |
| December 2, 2172 | 0.1302 AU (19.5 million km) | 13.3 km/s |
| September 10, 2181 | 0.0267 AU (4.0 million km) | 17.5 km/s |
| February 27, 2190 | 0.1250 AU (18.7 million km) | 14.9 km/s |
| January 1, 2192 | 0.1353 AU (20.2 million km) | 13.4 km/s |
| August 25, 2195 | 0.1627 AU (24.3 million km) | 14.0 km/s |
| October 14, 2200 | 0.1129 AU (16.9 million km) | 22.0 km/s |
4450 Pan (1987 SY) 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
4450 Pan is a highly eccentric asteroid and contact binary, classified as a potentially hazardous asteroid and near-Earth object of the Apollo group, approximately 1.1 kilometers in diameter. It was discovered on 25 September 1987, by American astronomers Eugene and Carolyn Shoemaker at Palomar Observatory in California, United States. It was named after Pan from Greek mythology.
4450 Pan (1987 SY) 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 4450 Pan (1987 SY) is 0.0420 AU (6.3 million km) on August 31, 1916, at a speed of approximately 18.4 km/s.
4450 Pan (1987 SY) has an estimated diameter of 1.51 km (934โ2089 meters range). Its absolute magnitude (H) is 17.27, which NASA uses along with assumed albedo to estimate size.