Imaging telescopes or lenses: Canon 200 mm f/2.8 L II USM
Imaging cameras: Moravian Instruments G2-8300FW
Mounts: SkyWatcher AZ-EQ6 GT
Guiding telescopes or lenses: Orion Guidescope 60mm
Guiding cameras: ZWO ASI 120 MM-S
Software: PixInsight 1.8 · INDILib · Kstars team Kstars/Ekos
Filters: Baader Planetarium LRGB
Dates:Aug. 23, 2020
Frames: 56x300"
Integration: 4.7 hours
Avg. Moon age: 4.94 days
Avg. Moon phase: 25.17%
Astrometry.net job: 3900444
RA center: 21h 6' 46"
DEC center: +60° 33' 39"
Pixel scale: 5.727 arcsec/pixel
Orientation: 2.070 degrees
Field radius: 3.318 degrees
Resolution: 2506x3334
Locations: Sierra de Hornachos, Hornachos, Badajoz, Spain
Data source: Traveller
At the southwest of Alderamin (top left), in Cepheus, lies this faint (fainter than I though, at least) HII nebula, catalogued as Sh2-129 . Also interesting are the few black patches that surround the nebula, especially LDN1082, for a longer focal length.
To me, the most prominent feature are eyes of the bat, the two stars that look similar in magnitude but have strikingly different colors. The bluish one is indeed embedded in the Squid Nebula (Ou4), that is not visible in this image, needing very deep exposures with [O III] filters to show up.
So maybe I guess this is again the same old 'work in progress/needs more data' story. Yeah, you know exactly what I'm talking about, don't you?
200mm, f/4
L: 26x 300s
R: 10x 300s
G: 10x 300s
B: 10x 300s
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