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Click the image for a 72%
size view. (2400 x 1500 - 1.18 MB)
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Instrument |
Takahashi FSQ-106ED @
f/5.0 (530 mm F.L.) Captured at 2.1 arcsec/pixel. Shown at
2.93 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. |
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Acquisition Data |
4/18/2017 to
4/29/2017
Chino Valley, AZ with CCD Commander & CCDSoft. |
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Exposure |
|
Lum |
360 min. (36
x 10 min. each) binned 1x1 |
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RGB |
600 min. (20
x 10 min. each) " |
RGB
combine ratios are 1.00,
0.95, 0.91 |
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Software |
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PixInsight & Photoshop CS6.
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eXcalibrator v5.0 for
(g:r)
color balancing, using 136 stars from the APASS database.
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PixInsight
processing includes calibration, registering, stacking, LRGB
creation, gradient removal and non-linear stretching
with HistogramTransformation .
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Noiseware 5, a
PhotoShop plug-in.
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PhotoShop for
final touch up.
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Comment |
North is to the
right.
As an intermediate
spiral galaxy, IC 2574 is in between the classifications of a barred
spiral galaxy and an unbarred spiral galaxy. It is designated as
SABm in the galaxy classification scheme. These galaxies usually
have a single spiral arm, and are named after their prototype, the
Large Magellanic Cloud. IC 2574 clearly appears to have two arms.
IC 2574 is about 12
million light-years away, in the constellation Ursa Major, and is a
member of the M81 group. Edwin Coddington discovered the galaxy in
1898. At that time, it was thought to be a nebula.
The image also shows the Integrated Flux Nebula. This feature, of
our galaxy, is faint dust illuminated by the general galactic
starlight. |
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