LDN 1257 in Cassiopeia
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dark nebula
10.2’
LDN 1257 - opacity 5/6, LDN 1258 opacity 2/6
Cassiopeia
450 to 800 light years
2013-08-01+02+11 + 2014-09-27
Gahberg observatory, Upper Austria
- Luminance: Lacerta 10” f/4 Newtonian + Sbig ST2000XM - RGB: 5” f/5 Newtionian + SXV-H9 + Baader RGB - RGB and Luminance capured simultaeosly -
ASA DDM 60pro
Luminance 28x10 + 14x15 min, RGB 17x10 min each
1000 min
high proper motion star in upper right corner! This star has about +7.6 mag and moves 0.25” per year in DEC and 0.19” per year in RA.