Location / Date

Zellerndorf, Jan 2017, Nov 2017 - Feb 2018

Telescope / Mount / Guiding

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

Camera / Exposure

FLI ML8300 (4 panel mosaic):
Hα 29 x 20min

Moravian G3-16200 (2 panel mosaic):
LUM 64 x 6min
R 37 x 6min, G 31 x 6min, B 37 x 6min
Hα 4 x 20min

Total exposure time: 40h 14min

Processing

PixInsight, Fitswork, Photoshop

Notes

Cederblad 51 (Ced 51) is a blue reflection nebula in the constellation of Orion. It is embedded in the northern border of the very large molecular cloud and HII region Sharpless 2-264, which is also known as Lambda Orionis Ring. This star formation region contains also some dark nebulae (Barnard 30 - 32, LDN 1580 - 1584) and several Herbig-Haro objects (HH).

Herbig–Haro (HH) objects are bright patches of nebulosity associated with newborn stars. They are formed when narrow jets of partially ionised gas ejected by stars collide with nearby clouds of gas and dust at several hundred kilometres per second. Herbig–Haro objects are commonly found in star-forming regions.