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IC 2177 – Seagull Nebula

IC 2177, known as the Seagull Nebula and also cataloged as Sh2-296, is an emission nebula located on the border between the constellations of Monoceros and Canis Major. It has an apparent size of 120.0 × 40.0 arcminutes and lies about 7.5 degrees northeast of Sirius. Its apparent magnitude is +10.00 and it is located at an approximate distance of 5.9 thousand light-years.

General information

Constellation
Canis Major
Category
Nebulae
Date
26 January 2022

Capture

Total time
3h 00min
Subframes
300s (light frames: 36x) ISO 1600
Gain / Offset
0 / 0
Calibration
14 dark frames, 98 flat frames, 100 dark-flat frames and 100 bias frames

Equipment

Telescope
TS102 f/5.6
Camera
modified Nikon D90
Filters
Ha+OIII/Hb
Mount
HEQ-5 Pro belt drive
Guiding
PHD2, Guide scope 60mm/f4 + ASI224MC

Processing and environment

Processing
Stacked and post-processed with PixInsight 1.8
Acquisition
NINA
Location
l'Ampolla
Sky
Bortle 4

Additional versions

Annotated imageAnnotated field version identifying IC 2177 and helping to locate it within the overall scene.