|
Instrument |
Takahashi FSQ-106ED @
f/5.0 (530 mm F.L.) Captured at 2.1 arcsec/pixel. Shown at 4.2
and 5.88 arcsec/pixel. |
|
Mount |
Losmandy G11 with Gemini L4 v1.0 |
|
Camera |
SBIG STF-8300M Self
Guiding Package w/ mono ST-i, using Baader LRGB filters. |
|
Acquisition Data |
6/24/2014 to
7/03/2014 Chino Valley, AZ... with CCDSoft & CCD Commander. |
|
Exposure |
|
Lum |
336 min. (48 x
7 min.) binned 1x1 |
|
Red |
112 min. (16 x
7 min.) " |
|
Green
|
140 min. (20 x 7 min.)
" |
|
Blue
|
168 min. (24 x 7 min.)
" |
|
|
Software & Processing Notes |
-
CCDSoft, CCDStack, PixInsight
and Photoshop CS6.
-
No SDSS stars were
available for color balancing, so a standard image-train color
calibration was used, as determined by
eXcalibrator v4.25, and then adjusted for altitude
extinction.
-
CCDStack to
calibrate, register, normalize, data reject, combine the sub
exposures and to create the RGB
image.
-
PixInsight for
gradient removal and initial non-linear stretching.
-
PhotoShop for the
LRGB combine and final touch-up.
-
Noiseware 5, a
PhotoShop plug-in.
|
|
Comment |
North is to the right.
Looking very much like
a deadly virus, LDN 673 is located in the constellation Aquila. This
dark nebula, at a distance of about 600 light years, is in a dark
rift in the Milky Way that passes through the constellation.
Expansive molecular clouds in the Aquila rift make the distant stars
appear reddish, while the very dense LDN 673 nebula completely
blocks the starlight.
|
