Hemisphere:  Northern  ·  Constellation: Cepheus (Cep)
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LDN 1251, 


            Marco Prelini
LDN 1251
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Technical card

Imaging telescopes or lenses: Sky-Watcher 200/1000 PDS

Imaging cameras: ZWO ASI 294MC Pro

Mounts: Sky-Watcher AZ EQ6-GT

Guiding telescopes or lenses: Artesky Ultraguide 60/240 mm

Guiding cameras: ZWO ASI 120 MM Mini

Focal reducers: Baader MPCC Mark III

Software: Photoshop CC  ·  Sequence Generator Pro  ·  PixInsight

Filters: Baader UV/IR Cut

Dates:Sept. 18, 2020

Frames: 31x600" (gain: 120.00) -10C bin 1x1

Integration: 5.2 hours

Darks: ~31

Flats: ~31

Flat darks: ~31

Avg. Moon age: 1.21 days

Avg. Moon phase: 1.64%

Bortle Dark-Sky Scale: 3.00

Mean SQM: 21.60

Temperature: 10.00

Basic astrometry details

Astrometry.net job: 3893149

RA center: 22h 33' 42"

DEC center: +75° 12' 14"

Pixel scale: 0.946 arcsec/pixel

Orientation: 4.830 degrees

Field radius: 0.641 degrees

Resolution: 4011x2775

Locations: Osservatorio di Febbio, Febbio, Reggio Emilia, Italy

Data source: Traveller


Down in the Cepheus molecular complex, there is this dark nebula. Its elongated shape is due to the interaction with the bubble of a supernovae explosion.
The red stains inside the darkest part of the nebulae are Herbig-Haro objects caused by new born stars forming. New worlds are going to rise there.