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Click the image for a 50%
size view. (1500 x 1000 - 635 KB)
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Instrument |
Takahashi FSQ-106ED @
f/5.0 (530 mm F.L.) Captured at 2.1 arcsec/pixel. Shown at
4.2 and 8.4 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 LRGB filters. |
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Acquisition Data |
6/14/2017
Chino Valley, AZ with CCD Commander & CCDSoft, unguided. |
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Exposure |
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Lum |
3 min. (1
x 3 min. ) binned 1x1 |
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RGB |
9 min. (1
x 3 min. each) " |
RGB
combine ratios are 1.00,
0.93, 0.95 |
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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 149 stars from the SDSS-DR9 database.
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PixInsight
processing includes calibration, registering, 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
top.
Comet C/2015 V2
(Johnson) is a long-period comet discovered on November 3rd, 2015 by
Jess Johnson. The comet made its closest approach to Earth on June
5, 2017, at a distance of about 75 million miles. It brightened to
about magnitude 8. |
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