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Special Notice #342: PU CMa, then IY UMa and MR UMa next HST/COS targets

March 18, 2013:  Further to AAVSO Alert Notice 471 (, HST/COS is scheduled to observe the SU UMa-type dwarf nova PU CMa:

PU CMa   2013 March 22 00:00:43 through 02:36:08 UT

The HST observations of PU UMa may be cancelled/postponed, as PU CMa is currently in outburst, according to observations reported to the AAVSO:

AAVSO 49 Bay State Rd. Cambridge, MA 02138 617-354-0484