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

Processing

PixInsight, Fitswork, Photoshop

Notes

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.