NGC 6905 - Blue Flash Nebula
Delphinus
Penryn, California
July 2006 / 2010
M 250 @ f9.3,
ST-10XME (ag, ST-4)
RGB 5 minute subs (2006)
Lum 10 minute subs (2010)
A small (31 arc second) mag. 12 classic planetary nebula.
The central star is a Wolf-Rayet star and is one of the three hottest
known star (Miskey et. al., 2000).