Monday, February 22, 2010
Planetary Nebula, PK 164+31.1, more lights
Nebula in natural color. Narrowband channels are mixed to match visible spectrum. Red=80% H-alpha+20% S-II, Green=O-III and Blue=80% O-III+20% H-alpha to compensate otherwise missing H-beta.
At the same time as I was imaging IC 443 in prevoius post, I shot more lights for this dim planetary in Constellation Lynx, since IC 433 was too low after midnight.
Due the low brightness this objet is not commonly imaged, even though it has a largish angular diameter to a planetary nebula. (6'.67" x 6'.67")
Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack.
Deconvolution with a CCDSharp, 30 iterations.
Levels, curves and color combine in PS CS3. -
Telescope, Meade LX200 GPS 12" @ f5
Camera, QHY9
Guiding, SXV-AO @ 9Hz
Image Scale, 1,5 arcseconds/pixel
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Exposures
H-alpha 32x1200s, binned 2x2 and 7x1200s, binned 3x3 = 13h
O-III 2x600s, binned 4x4 and 1x1200s, binned 4x4
S-II 3x600s, binned 4x4 and 1x1200s, binned 4x4
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