|
|
|
Instrument |
Takahashi FSQ-106ED @
f/5.0 (530 mm F.L.) Captured at 2.1 arcsec/pixel. The Zoomify
image scale is 2.80 to 9.77 arcsec / pixel. |
|
Mount |
Losmandy G11 with Gemini L4 v1.0 |
|
Camera |
SBIG STF-8300M Self
Guiding Package w/ mono ST-i, using Baader LRGB and an Astrodon Hα filters. |
|
Acquisition Data |
9/26/2012 to 11/13/2012 Chino Valley, AZ... with CCDAutoPilot5
& CCDSoft. Off-axis guided. |
|
Exposure |
|
Lum
|
245 min. (49 x 5 min.
bin 1x1)
|
|
RGB
|
210 min. (14 x 5 min.
each bin 1x1)
|
|
Hα
|
420 min. (28 x 15 min.
bin 1x1)
|
|
|
Software |
-
CCDSoft, CCDStack,
Photoshop CS6, PixInsight and Noel Carboni's actions.
-
CCDStack to calibrate,
register, normalize, data reject, combine the sub exposures and to
create the RGB image.
-
eXcalibrator v3.1 for (g-r) color balancing, using 1,146 stars
from the SDSS-DR8 database.
-
PixInsight for
gradient removal and the
initial non-linear stretching.
-
PhotoShop for LRGB
combine, adding the Hα
data to the red channel and final touch-up.
-
Noiseware Pro, a PhotoShop plug-in.
|
|
Comment |
North is to the top.
IC 5146, The Cocoon
Nebula, is located in the constellation Cygnus. The central star, BD
+46°3474, illuminates the combination emission-reflection nebula.
Extending to the right, is the dark nebula Barnard 168 (B168).
IC 5146 and its associated dark nebula are about 4,000 light years
distant. The circular HII region is also catalogued as Sharpless
125. |
|
