|
Instrument |
12.5" RCOS @
~ f/9 (2880 mm fl) at 0.64 arcsec/pixel. Shown at 1.28 and
3.11 arcsec/pixel. |
|
Mount |
Paramount ME |
|
Camera |
SBIG STL-11000 w/
FW8 filter wheel & AstroDon Gen-2 RGB filters. |
|
Acquisition Data |
12/17/2015 to
2/12/2016 Chino Valley, AZ. with CCD Commander & CCDSoft. AOL
guided |
|
Exposure |
|
RGB |
675 min (15 x
15 min. each) Bin 1x1 |
eXcalibrator RGB ratios are 1.00,
0.96 & 1.19 |
|
Software & Processing Notes |
-
CCDSoft, CCDStack,
PixInsight, Photoshop CS6.
-
eXcalibrator
v5.0 for (g:r) color balancing, using
189 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
right.
NGC 1528 is an open
cluster in the constellation Perseus. William Herschel discovered
the cluster in 1790. It has about 165 stars and is 1500 to 2500
light years away. NGC 1528 as an estimated age of 270 to 370 million
years.
|
