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Cosmic Bubble NGC 6781
Looking in internet for references of this object I found that it is ofter called "Cosmic Bubble". It looks like a little bubble on a sea of stars.
Telescope: RCX400 14" @ F8 (FL=2865 mm)
Camera: QHY11
RGB: 120,120,120 10 min subs
HaO3: 210,210 15 min subs (Thanks to K. Charlwood for lending me the O3 filter)
Total exposure: 13 hours
I hope you like it,
Enrique
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