Location / Date

Zellerndorf, Oct and Nov 2015

Telescope / Mount / Guiding

ASA 10" Astrograph, ASA 3" Wynne Corrector
ASA DDM60, no Guiding

Camera / Exposure

Canon EOS 500D Mono:
L 58x15min ISO 400

Canon EOS 500D:
RGB 19x15min ISO 400

Total exposure time: 19h 15min

Processing

Theli, Fitswork, PixInsight, Photoshop

Notes

NGC 225 is an open cluster in the constellation Cassiopeia. One of it's stars, the variable star V594 Cas, illuminates the blue reflection nebula van den Bergh (vdB) 4, which also cataloged as LBN 604. It seems, that vdB 4 is a remnant from the cloud that formed the cluster.