|
Instrument |
Takahashi FSQ-106ED @
f/5.0 (530 mm F.L.) Captured at 2.1 arcsec/pixel. Shown at 3.29 and
9.21 arcsec/pixel. |
|
Mount |
Losmandy G11 with Gemini L4 v1.0 for
Lum
Paramount MyT for RGB |
|
Camera |
SBIG STF-8300M Self
Guiding Package w/ mono ST-i, using AstroDon E-Series LRGB filters. |
|
Acquisition Data |
12/2015 & 10/2017 Chino Valley, AZ. with CCD Commander & CCDSoft. |
|
Exposure |
|
Lum |
406 min (58 x
7 min.) Bin 1x1 |
|
Red |
200 min (20 x
10 min.) " |
|
Green |
200 min (20 x
10 min.) " |
|
Blue |
320 min (32 x
10 min.) " |
eXcalibrator RGB ratios are 1.00,
1.03 & 0.95 |
|
Software & Processing Notes |
-
CCDSoft,
PixInsight, Photoshop CS6.
-
eXcalibrator
v6.1 for (g:r),(b:r) color balancing, using
914 stars from the Pan-STARRS database.
-
PixInsight
processing includes calibration, registering, stacking, LRGB
creation, gradient removal, non-linear stretching with
HistogramTransformation and selective color saturation.
-
PhotoShop for JPEG
creation.
|
|
Comment
|
The north is to
the left.
At the image center is
the open cluster NGC 225. It is about 2,000 light years away in the
constellation Cassiopeia and was discovered by Caroline Herschel in
1783. NGC 225 is very young with an estimated age of only one to 10
million years.
Nearby is the blue reflection nebula vdB 4. This may be the remains
of the nebula that formed the star cluster.
|
