Hemisphere:  Northern  ·  Constellation: Cepheus (Cep)
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LDN 1251 - Humpback Anglerfish Nebula, 


LDN 1251 - Humpback Anglerfish Nebula, 



LDN 1251 - Humpback Anglerfish Nebula

Technical card

Imaging telescopes or lenses: Explore Scientific ED127 FCD 100 Air-Spaced Triplet Apochromatic Refractor

Imaging cameras: ZWO ASI1600MM-Cool

Mounts: SkyWatcher EQ6-R Pro (EQMOD)

Guiding telescopes or lenses: Orion ShortTube 80

Guiding cameras: ZWO ASI290MM Mini

Focal reducers: Explore Scientific 0.7 Reducer/Flattener

Software: N.I.N.A.  ·  PHD2  ·  PixInsight

Filters: ZWO 1.25" Green  ·  ZWO 1.25" Blue  ·  ZWO 1.25" Red  ·  ZWO 1.25" Lum

Accessory: Moonlite CFL 2.5 w/ Stepper Motor  ·  ZWO EFW 8x1.25" Filter Wheel  ·  Pegasus Astro Dual Motor Focus Controller

Dates:June 16, 2020June 17, 2020June 18, 2020June 19, 2020

ZWO 1.25" Blue: 50x90" (gain: 75.00) -20C bin 1x1
ZWO 1.25" Green: 98x90" (gain: 75.00) -20C bin 1x1
ZWO 1.25" Lum: 367x90" (gain: 75.00) -20C bin 1x1
ZWO 1.25" Red: 92x90" (gain: 75.00) -20C bin 1x1

Integration: 15.2 hours

Darks: ~50

Flats: ~50

Flat darks: ~50

Bias: ~50

Avg. Moon age: 26.41 days

Avg. Moon phase: 11.56%

Bortle Dark-Sky Scale: 5.00

Temperature: 12.00

Basic astrometry details

Astrometry.net job: 3629917

RA center: 22h 32' 21"

DEC center: +75° 13' 30"

Pixel scale: 1.168 arcsec/pixel

Orientation: 358.327 degrees

Field radius: 0.898 degrees

Resolution: 4406x3348

Locations: -= αrα αd αsτrα =- observatory, Cape Elizabeth, ME, United States

Data source: Backyard


Lynds Dark Nebula (LDN) 1251 is a large star forming molecular cloud located about 1,000 light-years away in the constellation Cepheus. It is one of many sites of low and intermediate mass star formation making up the region known as the Cepheus Flare. My FOV is estimated to be ~10 light-years in width.

Within the various patches of faint clouds captured here lurk some ever-interesting Herbig-Haro objects, a few of which are labelled in my annotated version, including HH 149, HH 189, and HH 189 C. A few distant galaxies are also visible around the edges of the cloud, barely visible through our dusty line-of-sight.

I really love this object. The chaotic clouds and the striking resemblance to a hellish humpback anglerfish is unsettling and beautiful at the same time.



  • Final
    LDN 1251 - Humpback Anglerfish Nebula, 


    LDN 1251 - Humpback Anglerfish Nebula, 




Description: PixInsight annotated revision.

Uploaded: ...

Sky plot

Sky plot


LDN 1251 - Humpback Anglerfish Nebula,