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Click the image for a larger
view. (1600 x 1066 - 0.79 MB)
Click the image for a larger
view. (1333 x 1000 - 0.83 MB)
|
Instrument |
Takahashi FSQ-106ED @
f/5.0 (530 mm F.L.) Captured at 2.1 arcsec/pixel. Shown at 4.2 and 8.95 arcsec/pixel. |
|
Mount |
Losmandy G11 with Gemini L4 v1.0 |
|
Camera |
SBIG STF-8300M Self
Guiding Package w/ mono ST-i, using Baader LRGB filters. |
|
Acquisition Data |
1/19/2015
Chino Valley, AZ |
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Exposure |
|
Lum |
20 min. (10 x
2 min.) binned 1x1 |
|
RGB |
60 min. (10 x
2 min. ea.) " |
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The second
image uses only 1 2-min exposure for each LRGB channel. |
eXcalibrator RGB
ratios are 1.00, 1.20 & 1.42
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Software |
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CCDSoft, CCDStack,
PixInsight & Photoshop CS6.
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No SDSS stars were
available for color balancing, so a standard image-train
calibration was used, as determined by
eXcalibrator v4.30, and then adjusted for altitude
extinction.
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CCDStack to
calibrate the sub exposures.
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PixInsight
processing includes sub exposure regristration and
stacking, RGB creation, gradient repair, non-linear stretching with HistogramTransformation
and MaskedStretchand .
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PhotoShop for
creating the LRGB and final touch up.
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Noiseware 5, a
PhotoShop plug-in.
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Comment |
Comet 2014 Q2
(Lovejoy) is a long-period comet discovered on August 17, 2014 by
Terry Lovejoy. The comet made its closest approach to Earth on
January 7, 2015, at a distance of about 43 million miles. It
brightened to about magnitude 5. It is due to return in about 8000
years. |
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