Hemisphere:  Southern  ·  Constellation: Canis Major (CMa)  ·  Contains:  IC 2177  ·  NGC 2335  ·  NGC 2343
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IC 2177, The Seagull Nebula, 


            Steven Bellavia
IC 2177, The Seagull Nebula
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IC 2177, The Seagull Nebula

Technical card

Imaging telescopes or lenses: William Optics RedCat 51 Petzval APO  ·  TS-Optics PHOTOLINE 72mm f/6

Imaging cameras: ZWO ASI183MC Pro  ·  ZWO ASI 183MM Pro

Mounts: Sky-Watcher EQ-6R Pro SynScan

Guiding telescopes or lenses: The Bellavia Micro 25mm f/6.2 guidescope  ·  The Bellavia Basic 50mm f/6 guidescope

Guiding cameras: ZWO ASI 290MC  ·  ASI224MC

Focal reducers: Starizona Apex ED S 0.65x Reducer/Flattener

Software: IDEIKI AstroPhotography Tool (APT)  ·  Stark Labs Nebulosity 4.2  ·  Digital Photo Professional  ·  Annie's Astro Actions V7  ·  Noel Carboni's Astro Tools for PhotoShop Noel Carboni Actions  ·  PHD2 Guiding

Filters: Astronomik 6nm Ha  ·  ZWO Duo-Band Filter

Accessory: Starizona slightly modified 2" Filter Slider

Dates:Dec. 26, 2020Jan. 18, 2021

Astronomik 6nm Ha: 35x240" (gain: 111.00) -15C bin 1x1
ZWO Duo-Band Filter: 45x240" (gain: 111.00) -15C bin 1x1

Integration: 5.3 hours

Darks: ~30

Flats: ~30

Flat darks: ~30

Avg. Moon age: 8.31 days

Avg. Moon phase: 57.82%

Bortle Dark-Sky Scale: 4.00

Mean SQM: 19.60

Mean FWHM: 4.00

Temperature: -1.50

Basic astrometry details

Astrometry.net job: 4185414

RA center: 7h 5' 48"

DEC center: -11° 16' 33"

Pixel scale: 1.734 arcsec/pixel

Orientation: 88.179 degrees

Field radius: 1.582 degrees

Resolution: 5464x3643

Data source: Traveller


IC 2177 is a broad expanse of glowing gas and dust that lies along the border between the constellations Monoceros and Canis Major, approximately 4,000 light years from Earth. It is an H-II region centered on the star HD 53367. This nebula was discovered by Welsh amateur astronomer Isaac Roberts and was described by him as "pretty bright, extremely large, irregularly round, very diffuse."

The name Seagull Nebula is sometimes applied by amateur astronomers to this emission region, although it more properly includes the neighboring regions of star clusters, dust clouds and reflection nebulae. This latter region includes the open clusters NGC 2335 and NGC 2343.

NGC 2327 is located in IC 2177. It is also known as the Seagull's Head, due to its larger presence in the Seagull nebula.

This was First Light for my TS-Optics Photoline 72mm f/6 FPL-53/Lanthanum APO doublet with a Starizona Apex-S 0.65X reducer/flattener.



  • IC 2177, The Seagull Nebula, 


            Steven Bellavia
  • Final
    IC 2177, The Seagull Nebula, 


            Steven Bellavia

Sky plot

Sky plot


IC 2177, The Seagull Nebula, 


            Steven Bellavia