Perhaps this is taking snapshot stellar spectra from the sublime to the ludicrous! The above has been extracted from the previous inclined Sword of Orion. As anticipated, the spectral lines are fat, from the extended-object nature of the nebula. Interesting to note that the OIII doublet manifests itself overwhelmingly at the longer wavelength, 5007A, with the shorter wavelength 4959A a lot weaker. H-beta seems quite strong, but do I see some H-gamma in there too? I happened to have an old image of the Nebula taken through a duo-tone filter (Astronomik UHC combined with a UV/IR Blocker). The 2 passbands recorded (simultaneously) are also arrowed on the spectrogram. Wondering what wavelength was most prominent where, I split out the Red pixels (representing Ha) and displayed it middle above. The remaining passband is in the left image. Unfortunately the demarkations are muddled up by Canon's Bayer array. It leaks Ha significantly into the G and B pixels. Only significant and obvious conclusion is that the Running Man is weak in both OIII and Ha and is thus presumably mostly shorter wavelength reflections, rather than emissive. Perhaps.

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