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NGC 6826 Blinking Planetary 
Penryn, California
May 2005
M 250 @ f9.3 (ag, ST-4)
ST-10XME LRGB 30 seconds each

A 25 arc-second mag.9.2 planetary.  Note the lobes at the 2 and 8 o-clock positions.

Called the blinking nebula because of a tendency to disappear when switching from averted vision to direct vision while observing the nebula.