This image of the Cave Nebula is a HaLRGB blend taken with the AP130 Gran Turismo (w/Astro-Tech Field Flattener) F/6.3 and Parsec 8300M, mounted on the AP900GTO. Image data captured in August 2011, reprocessed in August 2014.

19 x 15 minutes Luminance 6 x 30 minutes Ha Luminance 9 x 15 minutes each for RGB 2×2

The Cave Nebula Sh2-155 region includes dark nebula LDN1216 and reflection nebula vdB 155.