I don’t think it could be satellite. Camera exposure was 0.16 seconds and it moved about 6 degrees in that time. I had captured three similar images over past four or so years with meteor capture camera. It is unlikely some sort of electrical discharge because it is so straight. It been suggested to me that it is cosmic ray strike parallel to CCD sensor. But – yes it should not create spectra. I just don’t know what it is.
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