IC 2177 - Seagull Nebula
Image awarded APOD BRASIL on 19Feb26
Image awarded APOD by ASTRONOMIA on 23Feb26
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IC 2177 is a region of nebulosity that lies along the border between the constellations Monoceros and Canis Major. It is a roughly circular H II region centered on the Be 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 neighbouring 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.
Imaging telescope: Takahashi FSQ130ED
Imaging camera: ASI 2600MM
Mount: JTW Trident P75
Guiding telescope: Takahashi FS60CB
Guiding camera: ASI 678 MM (BIN 2)
Focal Extender / Reducer: 0.73X
Software: Sequence Generator Pro SGP (for capture) PHD 2 (guiding), Astro Pixel Processor, PixInsight.
Filters: Astrodon Ha (3nm), Astrodon OIII (3nm), Astrodon RGB.
Accessories: Robofocus Focuser controlled by Lunatico Armadillo, ATIK EFW 3, RB Focus Gaius S2, RB Focus Excalibur.
Dates: 30th Jan. - 6th Feb. 2026
Frames: (Total)
Astrodon Ha 24 x 600"
Astrodon OIII 24 x 600"
Astrodon SII 24 x 600"
Astrodon RGB 3 x 10 x 120"
Total integration = 13 Hours
Center (RA, Dec): (106.591, -11.073)
Center (RA, hms): 07h 06m 21.781s
Center (Dec, dms): -11° 04' 23.433"
Size: 2.72 x 1.82 deg
Radius: 1.636 deg
Pixel scale: 1.63 arcsec/pixel
"Orientation": Up is 54.4 degrees E of N
The name Seagull Nebula is sometimes applied by amateur astronomers to this emission region, although it more properly includes the neighbouring 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.
Imaging telescope: Takahashi FSQ130ED
Imaging camera: ASI 2600MM
Mount: JTW Trident P75
Guiding telescope: Takahashi FS60CB
Guiding camera: ASI 678 MM (BIN 2)
Focal Extender / Reducer: 0.73X
Software: Sequence Generator Pro SGP (for capture) PHD 2 (guiding), Astro Pixel Processor, PixInsight.
Filters: Astrodon Ha (3nm), Astrodon OIII (3nm), Astrodon RGB.
Accessories: Robofocus Focuser controlled by Lunatico Armadillo, ATIK EFW 3, RB Focus Gaius S2, RB Focus Excalibur.
Dates: 30th Jan. - 6th Feb. 2026
Frames: (Total)
Astrodon Ha 24 x 600"
Astrodon OIII 24 x 600"
Astrodon SII 24 x 600"
Astrodon RGB 3 x 10 x 120"
Total integration = 13 Hours
Center (RA, Dec): (106.591, -11.073)
Center (RA, hms): 07h 06m 21.781s
Center (Dec, dms): -11° 04' 23.433"
Size: 2.72 x 1.82 deg
Radius: 1.636 deg
Pixel scale: 1.63 arcsec/pixel
"Orientation": Up is 54.4 degrees E of N
Sky Map and Finding Chart
SII, Ha & OIII in the Image:
Interesting size comparison, courtesy of Telescopius website: If we could see the nebula and the moon at the same time:
Annotated Image:
