|
|
|
Instrument |
12.5" RCOS @
~f/9 (2880 mm fl) 0.64 arcsec / pixel. The Zoomify image scale
is 0.85 to 3.59 arcsec / pixel. |
|
Mount |
Paramount ME |
|
Camera |
SBIG STL-11000 w/ internal filter wheel, AstroDon Gen II Filters |
|
Acquisition Data |
5/13/2012 to 5/27/2012 Chino Valley, AZ... with CCDAutoPilot3
& CCDSoft. AOL guided |
|
Exposure |
|
Lum |
600.0 min. (20
x 30 min. bin 1x1 - best of 27) |
|
Red
|
150.0 min. (10 x
900 sec. bin 2x2) |
|
Green |
144.0 min. (10
x 864 sec. bin 2x2) |
|
Blue |
158.3 min. (10 x
950 sec. bin 2x2) |
|
|
Software |
-
CCDSoft, CCDStack,
Photoshop CS3 w/ the Fits Liberator plugin, Noel Carboni's actions.
-
eXcalibrator v3.1 (g-r) color balancing, using 68 stars
from the SDSS-DR8 database.
-
PixFix32 (pre-beta) to
repair column defects.
-
CCDBand-Aid (pre-beta) to repair the
STL-11000M vertical bars.
-
CCDStack to calibrate,
register, normalize, data reject, combine the sub exposures,
selective deconvolution and
the RGB color image.
-
PhotoShop
none-linear stretching
and the LRGB combine.
-
Noiseware Pro, a PhotoShop plug-in.
|
|
Comment |
North is to the top.
NGC 5905 and NGC 5808, in the constellation Draco, are beautiful
examples of spiral galaxies seen from different angles. Their
respective distances are 155 and 148 million light-years, with NGC
5905 at the upper-right. Although they are relatively close to
each other, there is no interaction between them.
NGC 5905 has a strong central bar and is a type SBb galaxy. It looks
a similar our galaxy, The Milky Way, which is type SBc.
Also in the image are about 2000 cataloged galaxies down to
magnitude 22.5 with many more that are not cataloged and even
fainter. There are eight QSO's, with the most distant having a
redshift of z = 2.57. Finally there are seven faint galaxy clusters
with redshifts of z = 0.41 to 0.56.
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