SH2-157 - The Lobster Claw Nebula
Sun Oct 25 2026
I couldn’t fit the entirety of this nebula in my FOV but thought it might be nice to do a closeup of this one. I’ve been very lucky to have a lot of clear nights recently and spent a lot of the time on this one.
About this object
- Type
- Emission Nebula
- Constellation
- Cassiopeia (the Queen)
- Catalogue designations
- Sh2-157
Sh2-157 lies in the constellation Cassiopeia (the Queen). This locator chart shows where it sits in the night sky.
Acquisition
- Antlia 3nm Narrowband H-alpha 36 mm: 164 × 3m (8h 12m)
- Antlia 3nm Narrowband Oxygen III 36 mm: 117 × 3m (5h 51m)
- Antlia 3nm Narrowband Sulfur II 36 mm: 63 × 3m (3h 9m)
- Antlia V-Pro Red 36 mm: 120 × 30s (1h 0m)
- Antlia V-Pro Green 36 mm: 120 × 30s (1h 0m)
- Antlia V-Pro Blue 36 mm: 120 × 30s (1h 0m)
- Total integration: 20h 12m
Equipment
- Telescope / Lens: Celestron C8
- Camera: ZWO ASI2600MM Pro
- Mount: Sky-Watcher EQ6
- Filters: Antlia 3nm Narrowband H-alpha 36 mm, Antlia 3nm Narrowband Oxygen III 36 mm, Antlia 3nm Narrowband Sulfur II 36 mm, Antlia V-Pro Blue 36 mm, Antlia V-Pro Green 36 mm, Antlia V-Pro Red 36 mm
- Guiding scope: SVBony SV106 60mm Guide Scope
- Guiding camera: ZWO ASI174MM Mini
- Accessories: Celestron 0.63X SCT Reducer (94175), ZWO EFW 7 x 36mm
- Software: Pleiades Astrophoto PixInsight
Astrophotography by David Joyce, AstroDavido.