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Messier 20 - The "Trifid" in narrowband
About this observation
Observer
Ian Sharp
Time of observation
09/06/2014 - 15:51
Object
Messier 20
Observing location
SSO, Australia
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Another super image by Iab using the SSO. He reports that it was a real struggle to find a palette that worked because the Ha data was so strong. The regular Hubble palette caused a very green result, so he used this mix of channels:
R: (Ha x 0.50) + (SII x 0.50)
G: (OIII x 0.85) + (Ha x 0.15)
B: OIII
Taken remotely from SSO, Australia over the past few weeks, there are 38 hours of exposure in this image as follows:
Ha: 27 x 1800s
OIII: 28 x 1800s
SII: 21 x 1800s
The details of the equipment used to take this are as follows:
- Optical Tube Assembly RCOS 12.5” F/9 (2857mm focal length) Carbon-Fibre Tube w/TCC2, PIR and FFC
- Equatorial Mount Bisque Paramount ME
- Imaging Camera Apogee F16M-D9 (KAF-16803) with 7 slot filter wheel
- Imaging Camera Filters Astrodon Series II L,R,G,B, Ha (5nm), OIII (3nm) and SII (3nm)
- Guide Camera MMOAG with SBIG ST-402ME
- The system delivers a 44x44 arcmin FoV operating at .65 arcsec/pixel
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