Sh2-155 - Caldwell 9 - The Cave Nebula

            Sh2 -155 is an emission nebula visible in the constellation of Cepheus .

The nebula appears as an inhomogeneous set of bright parts and dark nebulae ; the northern part is the least obscured and shows the characteristic reddish colors typical of the HII regions . The southern part is instead affected by local darkening; the most notable dark nebula, which gives the complex Nebula name , is located in the west corner. A short distance from this there is a small reflection nebula , known as LNB524, which surrounds a group of ninth magnitude stars . The distance of the nebulous complex is estimated at 2400 light years from the Solar System .

Acquired on May 2020

filter H-alpha - 192 x 120 sec
filter OIII - 91 x 120 sec

Total integration time - 9:26 hours

Imaging telescope, mount and camera:

TS Optics/GSO 6'' f4 Newtonian

Celestron CGEM-DX

ASI1600MM-Cool

Processed with: Pixinsight and Photoshop CC

Location:

Home Backyard, Geleen, Limburg, Netherlands (Bortle 6/7)

Taken on: May 29, 2020

Tags:

astrophotography

backyard

nebula « less

Sets appears in: • Deep Sky Photography

Groups appears in: • Deepsky • Deep Space Astrophotography more » • Amateur Astronomy • ASTROPHOTO • Astrofotografia • Narrowband Astrophotography • BBC Sky at Night and Stargazing Live • Starry Night Astrophotography • Astrophotography (Pixinsight Processing) • Backyard Astrophotography • Amateur Astro-Photography • Deep Sky • Astrophotography - The Solar System and Beyond • Astro Photography • ExtraSolar Astrophoto • ZWO ASI Astronomy • ZWO ASI1600mm-cool • Astro Imaging « less

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