[Cave Nebula SH2-155]

 

Sh 2-155 (also designated Caldwell 9, Sharpless 155 or S155, or LBN529) is a diffuse nebula in the constellation Cepheus, within a larger nebula complex containing emission, reflection, and dark nebulosity. It is widely known as the Cave Nebula, though that name was applied earlier to Ced 201, a different nebula in Cepheus. Sh 2-155 is an ionized H II region with ongoing star formation activity, at an estimated distance of 725 parsecs (2400 light-years) from Earth.

Sh 2-155 was first noted as a galactic emission nebula in 1959 in the extended second edition of the Sharpless catalogue, being a part of the much larger Cep OB3 Association. Although Sh 2-155 is relatively faint for amateur observation, some of its structure may be seen visually through a moderately sized telescope under dark skies. (Wikipedia)

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Mount: SkyWatcher HEQ5 Pro

Guiding: ZWO ASI 120MM Mini USB 2.0 Mono Camera - Orion 50mm Guide Scope

Filter: Astronomik CLS CCD EOS APS-C Clip-Filter

Camera: Canon EOS 70D (full spectrum modified)

Askar 80 PHQ F7.5 Quadruplet Astrograph Telescope

Focal length: 600mm

Astronomik CLS CCD Clip Filter

ISO 800 - f7.5

8 hours total Integration

Single frame: 180 sec

Darks: 20 frames

Flats: 20 frames

Bios: 20 frames

DarkFlats: 20 frames

Bortle 5/6

Lunar: 100% on 4 hours data

Apps: N.I.N.A. > PHD2 > ASCOM > EQMOD

PixInsight > Photoshop >

RC Astro: StarXTerminator > NoiseXTerminator > BlurXTerminator >

Done