21P/Giacobini-Zinner (P/1900 Y1)

Wikipedia:

 

Discovery
Discovered by Michel GiacobiniErnst Zinner
Discovery date December 20, 1900
Alternative
designations
1900 III; P/1900 Y1; 1913 V;
P/1913 U1; 1926 VI; 1933 III;
1940 I; 1946 V; 1959 VIII;
1966 I; 1972 VI; 1979 III;
1985 XIII; 1992 IX
Orbital characteristics A
Orbital period 6.621 a
Dimensions 2 km[1]
Last perihelion 2018-Sep-10[1][2]
February 11, 2012[3]
July 2, 2005[3]
Next perihelion 2025-Mar-25[3]

 

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