Asteroids: Close Calls with Earth
     
Name
Closest Approach (in AU*)
Date
     
1989 FC
0.0046
 March 22, 1989
Hermes
0.005
 Oct. 30, 1937
Hathor
0.008
 Oct. 21, 1976
1988 TA
0.009
 Sept. 29, 1988
Adonis
0.015
 Feb. 7, 1936
1982 DB
0.028
 Jan. 23, 1982
1986 JK
0.028
 May 28-29, 1986
Dionysius
0.031
 June 19, 1984
Aristaeus
0.032
 April 1, 1977
Orpheus
0.032
 April 13, 1982
     
* AU = Astronomical unit. One AU = 93,000,000 miles (149,000,000 kilometers).
All distances are approximate.

Comets: Close Calls with Earth
     
Name Closest Approach (in AU*) Date
     
Comet 1491-II
0.009
 Feb. 20, 1491
Lexell
0.015
 July 1, 1770
Tempel-Swift-Tuttle
0.023
 Oct. 26, 1366
IRAS-Araki-Alcock
0.031
 May 11, 1983
Halley
0.033
 April 10, 837
     
* AU = Astronomical unit. One AU = 93,000,000 miles (149,000,000 kilometers).
All distances are approximate.

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