|
Instrument |
12.5" RCOS @
~f/9 (2880 mm fl) at 0.64 arcsec/pixel. Shown at 3.36 and 1.40 arcsec/pixel. |
|
Mount |
Paramount ME |
|
Camera |
SBIG STL-11000 w/
FW8 filter wheel, AstroDon Gen-2 Filters |
|
Acquisition Data |
11/6/2013
to 2/20/2014 Chino Valley, AZ... with CCD Commander & CCDSoft,
AOL guided. |
|
Exposure |
|
Lum |
240 min. (8 x
30 min.
) Bin 1x1 |
|
RGB |
315 min. (7 x 15 min.
each) Bin 2x2 |
eXcalibrator RGB
ratios are 1.00, 0.98 & 0.87 |
|
Software & Processing Notes |
-
CCDSoft, CCDStack,
PixInsight & Photoshop CS6.
-
eXcalibrator
v4.30 for (g:r) color balancing, using 23 stars from the
SDSS-DR9 database.
-
CCDBand-Aid to repair
KAI-11000M vertical bars.
-
CCDStack to
calibrate and register the sub
exposures and create the RGB image..
-
PixInsight
processing includes registering and stacking the luminance, gradient repair, non-linear stretching with HistogramTransformation
and selective detail enhancement with HDRMultiscaleTransform.
-
PhotoShop for
the LRGB combine and final touch up.
|
|
Comment |
North is to the left.
M78 (NGC 2068) is the
brightest reflection nebula of a group that also includes NGC 2064,
NGC 2067 and NGC 2071. The group is located in the Orion Molecular
Cloud Complex that is about 1,600 light years from Earth. M78 was
discovered by Pierre Méchain in 1780 and catalogued by Charles
Messier in the same year. |
