The European SOHO-spacecraft (Solar and Heliospheric Observatory) has discovered over 1350 comets but using the LASCO coronagraph it has officially found a periodic comet: P/2007 R5 (SOHO).

http://www.esa.int/esaCP/SEMXVK6H07F_Belgium_du_1.html

Comet makes death plunge toward Sun.

On March 12th, the Solar and Heliospheric Observatory (SOHO) watched as a comet plunged into the sun and disappeared.
Perfect animated gif.
http://spaceweather.com/images2010/12mar10...31l41qhgb2hl2l3