|
Instrument |
12.5" RCOS @
~ f/9 (2880 mm fl) at 0.64 arcsec/pixel. Shown at 1.33 and 3.2 arcsec/pixel. |
|
Mount |
Paramount ME |
|
Camera |
SBIG STL-11000 w/
FW8 filter wheel & AstroDon Gen-2 RGB filters. |
|
Acquisition Data |
3/9/2017 to
3/13/2017 Chino Valley, AZ. with CCD Commander & CCDSoft. AOL
guided |
|
Exposure |
|
RGB |
360 min (12 x
10 min. each) Bin 1x1 |
eXcalibrator RGB ratios are 1.00,
1.02 & 1.20 |
|
Software & Processing Notes
|
-
CCDSoft, CCDStack,
PixInsight, Photoshop CS6.
-
eXcalibrator
v5.0 for (g:r) color balancing, using
308 stars from the APASS database.
-
CCDBand-Aid to repair
KAI-11000M vertical bars.
-
CCDStack to
calibrate, data reject and combine the sub exposures, create the RGB
image.
-
PixInsight for
gradient removal, non-linear stretching with HistogramTransformation.
-
PhotoShop for the final touch-up.
|
|
Comment
|
The north is to the
top.
M50 is an open cluster
in the constellation Monoceros at a distance of about 3,000
light-years. G.D. Cassini discovered the cluster in 1711. Also
cataloged as NGC 2323, M50 as an estimated age of 78 million years.
|
