On the 29th May, 2009, 07:00 UT, the magnitude 9.4 comet C/2009 F6 (Yi-SWAN) will pass 1.37° from the magnitude 7 open cluster NGC 1857 in the constellation Auriga. Position(2000): RA 5 : 20.2, Dec +39 : 21
Comet C/2009 F6 (Yi-SWAN), at magnitude 8.9, is to make a close encounter (0.58°) with the magnitude 11.8 Open Cluster NGC 1220, in the constellation Perseus, at 21:00 UT, 30th April, 2009.