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Bubble Nebula

NGC7635, NGC7538, M52

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This semi-widefield of the Bubble nebula area includes the open star cluster M52 upper left and active star forming region NGC7538 upper right.  NGC7538 includes the largest known protostar, estimated to be 300 times larger than our solar system.

Acquisition Details

Ha = 42x10min
(OSC cam with Ha filter)
OIII = 41x10min
SII = 41x10min
Total = 20hrs 50min