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jshuder | all galleries >> Astrophotography >> Planetary Nebulae > Abell 71 (PN A66 71)
PN G084.9+04.4
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Abell 71 (PN A66 71)
PN G084.9+04.4

Abell 71 (PN A66 71, PK 085+04.1, PN G084.9+04.4, Sh 2-116) HII emission nebula in Cygnus. Initially
cataloged as a planetary nebula, but now recognized to be an HII region. This is a fairly dim object
with low surface brightness. Taken July 12, 13 and 14, 2009 with a Q285M and a C8N at f5 on a
Losmandy G11/Gemini mount. The H-alpha subframes were 7 minutes, while the RGB frames were 4 minutes.
The final total exposures were (Ha):(R+Ha):G:B (min) = 315:(52+315):52:52. Color balance was achieved
via numerically scaled channels using a G type field star. Captured with Nebulosity, calibrated and
sigma combined in Iris with other processing using PixInsight LE and Photoshop CS. North is up.

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Sakib 27-Jun-2016 04:11
Actually this is a genuine planetary nebula! You should add some OIII to it.