The Cave Nebula

The Cave Nebula ( Sharpless 2-155, Caldwell 9) is part of an extensive region of ionized hydrogen gas region. Sharpless 2-155 is a dim and very diffuse nebula within a larger nebula complex containing emission, reflection, and dark nebulosity. It is located in the constellation Cepheus and associated with the Cepheus B giant molecular cloud, laying at a distance of about 2800 light-years. Part of the cloud is illuminated by a pack of hot, young stars known as the Cepheus OB3 association.

Instruments and exposure data:

W.O FLT110 with dedicated TMB field flattener

FeatherTouch 3'''' focuser

Starizona MicroTouch autofocuser

W.O ZS80 ED

SBIG ST10XME CFW9

Meade DSI

Filters: Ha 5nm Astrodon_S[iI] 8nm Baader_O[iII] 3nm Astrodon

Sky-Watcher EQ6 Pro

Ha:50*8min bin1x1

S[iI]:63*8min bin1x1

O[iII]:57*8min bin1x1

Total exposure time:22h 40min

Vironas,Athens Greece