Cave Nebula Sharpless 155

Sharpless 155

A diffuse hydrogen nebula with some surrounding dark nebula. I personally don’t see how it got he cave nebula name. Area has active star formation approx 2400 light years distant in constellation Cepheus.

8 inch RC telescope, QSI 683 mono CCD camera atop a SB MyT mount unguided using protrack. 9 hours total exposure time.