|
|
Click the image for a 54% size
view. (1800 x 1350 - 1.37 MB)
|
Instrument |
Takahashi FSQ-106ED @
f/5.0 (530 mm F.L.) Captured at 2.1 arcsec/pixel. Shown at
3.91 and 9.39 arcsec/pixel. |
|
Mount |
Paramount MyT |
|
Camera |
SBIG STF-8300M Self
Guiding Package w/ mono ST-i, using AstroDon E-Series LRGB filters. |
|
Acquisition Data |
12/17/2017 to
1/18/2018
Chino Valley, AZ with CCD Commander & CCDSoft. |
|
Exposure |
|
Lum |
330 min. (33
x 10 min. each) Binned 1x1 |
|
RGB |
480 min. (16
x 10 min. each)
" |
RGB
combine ratios are 1.00,
0.95, 0.88 |
|
Software & Processing
Notes |
-
CCDSoft, CCDStack,
PixInsight, Photoshop CS6
-
eXcalibrator v5.0 for
(g:r)
color balancing, using 583 stars from the SDSS-DR9 database.
-
PixInsight
processing includes calibration, registering, stacking, LRGB
creation, gradient removal, non-linear stretching
with HistogramTransformation.
-
Noiseware 5, a PhotoShop plug-in.
-
PhotoShop final
touch-up includes background noise reduction.
|
|
Comment |
North is to the
top.
NGC 1342 is an open
cluster in the constellation Perseus, at a distance of 1700 to 2170
light-years. NGC 1342 contains 50 to 100 stars and is about 450
millions years old. William Herschel discovered the cluster on
December 28th, 1799.
This field of view is located just north of the Perseus molecular
cloud. Since the cloud is about 600 light-years distant, we can
assume that the cluster is located behind all the dust.
It is interesting that
LDN 1434 is classified as a dark nebula and LBN 718, 719 and 720 are
bright nebulae. Looking at this image, the reason for the difference
is not evident. I guess Beverly Lynds had her reasons.
|
|
