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Cave Nebula , the wild beauty of black and white, 


            Theodore Arampatz...
Cave Nebula , the wild beauty of black and white

Cave Nebula , the wild beauty of black and white

Technical card

Resolution: 2147x1455

Dates:Aug. 26, 2015

Frames:Ha 5nm: 50x480" -7C bin 1x1

Integration: 6.7 hours

Darks: ~30

Flats: ~25

Flat darks: ~25

Bias: ~100

Avg. Moon age: 11.08 days

Avg. Moon phase: 85.37%

Bortle Dark-Sky Scale: 8.00

Temperature: 28.00 job: 752492

RA center: 344.164 degrees

DEC center: 62.618 degrees

Pixel scale: 1.819 arcsec/pixel

Orientation: -178.620 degrees

Field radius: 0.655 degrees

Data source: Backyard


S 155, also known as the Cave Nebula, Sh2-155 or Caldwell 9, is a dim and very diffuse bright nebula within a larger nebula complex containing emission, reflection, and dark nebulosity. It is located in the constellation Cepheus.

Visually it is a difficult object, but with adequate exposure, makes a striking image. The nebula gets its name Cave Nebula from the dark lane at the eastern side abutting the brightest curve of emission nebulosity which gives the appearance of a deep cave when seen through a telescope visually.

from wikipedia

A new project begins...
I hope the weather,allow me to finish soon the other 2 narrowband filters

Instruments and exposure data:
W.O FLT110 with dedicated TMB field flattener
FeatherTouch 3'' focuser
Starizona MicroTouch autofocuser
Meade DSI
Filters: Ha 5nm Astrodon_S[II] 8nm Baader_O[III] 3nm Astrodon
Sky-Watcher EQ6 Pro

Ha:50*8min bin1x1
Total exposure time:6h 40min

Vironas,Athens Greece



Theodore Arampatz...
License: Attribution-NonCommercial-NoDerivs Creative Commons

Sky plot

Sky plot


Cave Nebula , the wild beauty of black and white, 


            Theodore Arampatz...