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Click the image for a ~ 54%
size view. (1800 x 1350 - 1.25 MB)
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The above image is
from a 1975 paper by
D. A.
Allen and M. V. Penston. |
The
possible light source for IC 2087
@ 100% resolution |
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[B77] (Bernes, 1977)
Reflection Nebula
@ 100% resolution
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GN 04.39.1 Reflection Nebula
@ 100% resolution |
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Instrument |
Takahashi FSQ-106ED @
f/5.0 (530 mm F.L.) Captured at 2.1 arcsec/pixel. Shown at
3.91 and 9.38 arcsec/pixel. |
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Mount |
Paramount MyT |
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Camera |
SBIG STF-8300M Self
Guiding Package w/ mono ST-i, using AstroDon E-Series RGB and
Ha filters. |
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Acquisition Data |
1/27/2017 to 1/31/2017
Chino Valley, AZ with CCD Commander & CCDSoft. |
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Exposure |
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Lum |
280 min. (28
x 10 min. each) binned 1x1 |
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RGB |
180 min. (
6
x 10 min. each) " |
RGB
combine ratios are 1.00,
0.86, 0.76 |
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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 63 stars from the SDSS-DR7 database.
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PixInsight
processing includes calibration, registering, stacking, LRGB
creation, 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.
At the image center is
the reflection nebula IC 2087. Near the upper-left is the reflection
nebula [B77] and to the lower right is GN 04.39.1. These three
nebulae are a bit unusual, as reflection nebulae are usually blue.
The large irregular dark nebula, Barnard 22, in the constellation
Taurus, obscures the three reflection nebulae. Within B22, Barnard
also identified B14 and B222. |
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