The "Lobster Claw" emission nebula (SH2-157) + Tommaso Massimo Stella + L-Ultimate

The "Lobster Claw" emission nebula (SH2-157) + Tommaso Massimo Stella + L-Ultimate

 

The "Lobster Claw" emission nebula (SH2-157) is located in the constellation of Cassiopeia about 11,000 light years from Earth.
It is very faint (not visible in the eyepiece of amateur telescopes) but it can be pointed by observing the star cluster NGC 7510 (on the lower right claw in the photo).
The arc zone, with a strong presence of doubly ionized oxygen, owes its shape to the stellar wind of several giant stars that are part of the much larger OB2 region.
The lights were taken on 09/21/2022 at the "Valle degli Ulivi" in Taranto (Italy)

Technical data
Sky: Bortle 6, SQM 20.4
Lights: 36x600s (6h total integration)
Telescope: TS PhotoLine Apochromatic FPL53 Triplet 102/564
Camera: Astroshop Omegon veTEC571C
Mount: Skywatcher AZ-EQ6 GT
Filters: Optolong Astronomy Filter L-Ultimate
Processing: DeepSkyStacker, Photoshop CC, PixInsight

Credit:  Tommaso Massimo Stella (Italy)

 

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