Hemisphere:  Southern  ·  Constellation: Orion (Ori)  ·  Contains:  Great Nebula in Orion  ·  M 42  ·  M 43  ·  NGC 1976  ·  NGC 1980  ·  NGC 1982  ·  The star 42Ori  ·  The star 59Gem  ·  The star θ1Ori  ·  The star θ2Ori  ·  The star ιGem  ·  The star ιOri
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narrowband M42, 



    
        

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narrowband M42
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narrowband M42

Imaging Telescopes Or Lenses
AT6RC
Imaging Cameras
Canon EOS 50D
Mounts
Orion SkyView Pro EQ
Filters
OIII 12nm
Accessories
TeleVue TRF-2008
Software
PixInsight · Binary Rivers Backyard EOS · PHD guiding
Guiding Telescopes Or Lenses
Orion Finderscope 9x50
Guiding Cameras
Meade DSI

Acquisition details

Dates:
Jan. 13, 2012
Frames:
Astronomik H-alpha 6nm: 49x240" (3h 16') ISO1600 15C bin 1x1
OIII 12nm: 69x240" (4h 36') ISO1600 15C bin 1x1
Integration:
7h 52'
Darks:
80
Flats:
80
Bias:
80
Avg. Moon age:
19.06 days
Avg. Moon phase:
80.50%
Bortle Dark-Sky Scale:
8.00

RA center: 05h35m14s.6

DEC center: -05°2620

Pixel scale: 1.761 arcsec/pixel

Orientation: -123.467 degrees

Field radius: 0.615 degrees

Resolution: 620x467

Locations: Oakland, None

Description

M42

canon 50d (modded), astronomik 6nm Ha, astronomik 15nm oiii.

at6rc+TRF-2008 focal reducer

ha = 49x240s = 196m = 3h16m

oiii = 69x240s = 276m = 4h36m

(oiii is really only 46 frames, but i integrated G+B, so it's like 1.5x the exposure from an SNR perspective)

total = 7h52m

r = ha

g = oiii

b = 0.7*oiii + 0.3*ha

captured with backyardeos

all processing in pixinsight 1.7.4

the weather's about to go to the dogs so i guess this is it for a while. the framing is goofy but i had intended to do a mosaic...

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narrowband M42, 



    
        

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