LDN 1242 Cepheus Dark Nebula - a photo on Flickriver

LDN 1242 Cepheus Dark Nebula

            A dark nebula or absorption nebula is a type of interstellar cloud, particularly molecular clouds, that is so dense that it obscures the visible wavelengths of light from objects behind it, such as background stars and emission or reflection nebulae. The extinction of the light is caused by interstellar dust grains located in the coldest, densest parts of molecular clouds. Clusters and large complexes of dark nebulae are associated with Giant Molecular Clouds. Isolated small dark nebulae are called Bok globules. Like other interstellar dust or material, things it obscures are only visible using radio waves in radio astronomy or infrared in infrared astronomy.

This dark nebula in Cepheus has no common name, unlike its better known near neighbour LDN 1235 the Shark Nebula. 


Controller: ZWO ASIAIR Plus
Main Camera: ZWO ASI533MC Pro at -10C
Filter: ZWO UV/IR Cut filter
Focuser: ZWO EAF
Guide Camera: ZWO ASI290MM Mini guidecam
Guidescope:  William Optics Refractor 50/200 mm 50mm 

Telescope: William Optics ZenithStar 81 APO
Mount: SkyWatcher EQ6-R Pro 

Stacked from:
Lights 40 at 180 seconds, gain 101, temp -10C
Darks 30 at 180 seconds, gain 101, temp -10C
Flats 30 at 5.3 seconds, gain 101, temp -10C
Dark Flats 30 at 5.3 seconds, gain 101, temp -10C

Bortle 4 sky. 
Integrated the saved frames in Astro Pixel Processor and adjusted in Photoshop CS4.
   

Taken on: August 17, 2023

Tags:

ZWO

asiairplus

pro

asi290mmmini

skywatcher

eq6r

Williams

optics

Zenithstar

zs81

eaf

EFW

ldn1242

dark

nebula

astronomy

astrophotography

night

sky « less

Sets appears in: • Astronomy • Nebulae

Groups appears in: • astrometry • BBC Sky at Night and Stargazing Live

Stats: 143 views

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