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I was out at Leyburn (Southern Astronomical Society dark sky site) last Friday and Saturday night and I noticed colour in Orion. The "wings" were a green colour and the dimmer areas in the nebula coming down from the wing structure was a distinctive pink to red (in a 12.5" dob). I also spotted the Horsehead nebula as a dark region / bite out of the background nebula. No Horsehead structure was visible - just a dark patch (often described as a thumb shape). This was unfiltered in the 12.5.
cheers
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