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Tuesday, March 15, 2011
Barnard 30, a dark nebula in Sh2-264, in Orion
Image is in HST-palette, (HST=Hubble Space Telescope) from the emission of ionized elements, R=Sulfur, G=Hydrogen and B=Oxygen. Star colors are mixed from the NB channels, Red=H-a, G=O-III and B= 85%O-III + 15%H-a.
Last night I shot data for S-II & O-III channels (Ionized Sulfur and Oxygen). Very dim but enough for narrowband color composition. Total exposure time is relatively short due the low elevation.
I haven't seen this one in narrowband palette before, please, let me know, if you have seen an emission line image of Barnad 30 somewhere. I'll like to see one for a reference.
B30 is part of the very large Sharpless object in Orion's head, Sh2-264. This large nebula spans 8 degrees of sky, that's 16 full Moons side by side, whole upper part of this image is covered with Sh2-264. Above image is about three degrees wide.
B30 lies about 1300 light years from Earth, above the triangular group of stars marking the head of constellation Orion.
Latest data from a Spitzer Space Telescope indicates, that this area is a star-birth region with many low mass stars and brown dwarfs.
Note. The size of the full Moon is marked as a gray circle for a scale. (Moon has an angular size of the 30', that's a 0,5 degrees)
Natural color composition from the emission of ionized elements, R=80%Hydrogen+20%Sulfur, G=100%Oxygen and B=85%Oxygen+15%Hydrogen to compensate otherwise missing H-beta emission. This composition is very close to a visual spectrum.
Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack.
Levels, curves and color combine in PS CS3.
Tokina AT-X 300mm f2.8 @ f2.8
Platform and guiding, Meade LX200 GPS 12" @ f5
Image Scale, 3,79 arc seconds/pixel
Baader H-alpha 7nm 9x1200s, binned 1x1
and 12x900s, binned 2x2
Baader O-III 8,5nm 3x900s, binned 2x2
Baader S-II 8nm 3x600s, binned 3x3