Dark Clouds LDN 981, LDN 982, LDN 984 and LDN 988

LDN 981 - 988

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Location / Date

Zellerndorf, May 2017

Telescope / Mount / Guiding

ASA 10" Astrograph, ASA 3" Wynne-Corrector (focal length 910mm)
ASA DDM60, no Guiding

Camera / Exposure

FLI ML8300: L 53 x 10min, RGB 12 x 10min each
                      Hα 6 x 30min

Total exposure time: 17h 50min


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Dark clouds (LDN 981, LDN 982, LDN 984 and LDN 988) in the constellation Cygnus.

Embedded in the LDN 988 are the reflection nebulas DG (Dorschner & Gürtler 1963) 169 (LBN 408?), DG 170 (LBN 412?) and DG 171 (LBN 409?) and the Herbig-Haro object HH 1051 (GN 21.00.7).

The whole field is filled with very faint, red Halpha emission nebulas. A little bit brighter one is Sh2-120.

Another interesting object is the T Tau-type variable star V1331 Cyg. the star is at the top of the dark cloud LDN 981 and is surrounded by a helix-shaped nebula which is originated from the star.

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