IC 2177 (Gum 1) in Hydrogen Alpha

IC 2177 in Hydrogen Alpha
All Images Copyright Steve Cannistra

Please click here or on image for a higher resolution view.

Magnitude:  ?
Size: 20' x 20'.
Distance: ?
RA: 7h 05m 20.2s
Dec: minus 10 degrees 42' 20"

IC 2177 is a region of hydrogen alpha emission located in the constellation Monoceros (the Unicorn).  It is shown as the bright, roughly circular region in the lower portion of the image, with a central vein of dark dust coursing through it.  IC 2177 is associated with a broad expanse of nebulosity that extends far beyond this FOV, and is shown best in this color image from Rob Gendler, which nicely illustrates why this object is sometimes referred to as the Seagull Nebula.  I chose to orient this image so that the "seagull" is on its head, which is not conventional but nevertheless presents an interesting perspective on this object.  In the upper right hand portion of my image is the open star cluster NGC 2335.   IC 2177 would not normally be a challenging target, but at my imaging site, its highest elevation is only 37 degrees.  Despite the "soft" seeing at this elevation, as well as my image scale of only 3.26 arcsec/pixel, there is still a good amount of detail that can be observed in this image.  Please view the higher magnification image here.

Photographic Details:

Date:  March 5, 2005
Takahashi Sky 90 at f4.5 with field flattener/focal reducer, on the G11 Losmandy Mount.
Autoguider:  SBIG STV with e-finder.
Camera:  SXV-H9
Astronomik Ha filter (13 nm bandpass).
Exposures:  27 x 5' each, binned 1 x 1, 2.25 hours total.
Conditions:  Temperature 28 degrees F; average transparency; poor seeing; intermittent mild breeze.
No dark, bias, or flat frames used.  Auto aligned in MaximDL; Sigma combined using RC Sigma Reject plug in, followed by DDP in ImagesPlus (IP).  Subsequent levels and curves adjustments in Photoshop CS (16 bit format).  Final sharpening using a combination of high pass filtering and Lucy-Richardson deconvolution techniques.

Please note:  Graphics on this website may not be reproduced without author permission.

Back to Nebulae