IC 2177 - Seagull Nebula
There is a 2020 version of this nebula HERE
IC 2177 is a region of nebulosity that lies along the border between the constellations Monoceros and Canis Major and is close to Sirius, the brightest star in the night sky . The nebula lies more than four hundred times further away than that famous star. It is a roughly circular H II region centered on the Be star HD 53367. Although a small bright clump in the Seagull Nebula complex was observed for the first time by the German-British astronomer Sir William Herschel back in 1785, the greater part had to await photographic discovery about a century later. This 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.
The complex of gas and dust that forms the head of the seagull glows brightly in the sky due to the strong ultraviolet radiation coming mostly from one brilliant young star — HD 53367 — that can be spotted in the upper left quadrant of the image and could be taken to be the seagull’s eye.
Imaging telescopes or lenses: Takahashi FSQ106ED
Imaging cameras: QSI 6120i
Mounts: Takahashi EM 400 Temma 2
Guiding telescopes or lenses: Takahashi FS 60 CB
Guiding cameras: QHY CCD QHY 5 II
Focal reducers: Takahashi QE 0.73x
Software: PHD 2, Pleiades Astrophoto PixInsight , Sequence Generator Pro SGP
Filters: Astrodon OIII 3nm, Astrodon Ha 3nm, Astrodon SII 3nm
Accessories: Robofocus Focuser, ATIK EFW2
Original Resolution: 4200 x 2835
Dates: 2nd - 12th Mar '16
Frames:
Astrodon Ha 3nm: 12x1200" bin 1x1
Astrodon OIII 3nm: 4x1200" bin 1x1
Astrodon SII 3nm: 9x1200" bin 1x1
Integration: 8 hours 20 minutes
Center (RA, Dec):(106.493, -10.818)
Center (RA, hms):07h 05m 58.390s
Center (Dec, dms):-10° 49' 03.966"
Size:1.92 x 1.3 deg
Radius:1.158 deg
Pixel scale:1.65 arcsec/pixel
Orientation:Up is 89.4 degrees E of N
The name Seagull Nebula is sometimes applied by amateur astronomers to this emission region, although it more properly includes the neighboring regions of star clusters, dust clouds and reflection nebulae. This latter region includes the open clusters NGC 2335 and NGC 2343.
The complex of gas and dust that forms the head of the seagull glows brightly in the sky due to the strong ultraviolet radiation coming mostly from one brilliant young star — HD 53367 — that can be spotted in the upper left quadrant of the image and could be taken to be the seagull’s eye.
Imaging telescopes or lenses: Takahashi FSQ106ED
Imaging cameras: QSI 6120i
Mounts: Takahashi EM 400 Temma 2
Guiding telescopes or lenses: Takahashi FS 60 CB
Guiding cameras: QHY CCD QHY 5 II
Focal reducers: Takahashi QE 0.73x
Software: PHD 2, Pleiades Astrophoto PixInsight , Sequence Generator Pro SGP
Filters: Astrodon OIII 3nm, Astrodon Ha 3nm, Astrodon SII 3nm
Accessories: Robofocus Focuser, ATIK EFW2
Original Resolution: 4200 x 2835
Dates: 2nd - 12th Mar '16
Frames:
Astrodon Ha 3nm: 12x1200" bin 1x1
Astrodon OIII 3nm: 4x1200" bin 1x1
Astrodon SII 3nm: 9x1200" bin 1x1
Integration: 8 hours 20 minutes
Center (RA, Dec):(106.493, -10.818)
Center (RA, hms):07h 05m 58.390s
Center (Dec, dms):-10° 49' 03.966"
Size:1.92 x 1.3 deg
Radius:1.158 deg
Pixel scale:1.65 arcsec/pixel
Orientation:Up is 89.4 degrees E of N
Sky Plot:
Annotated image
SII, Ha & OIII Data
Mono Version:
