….and growing….
Another nice fireball spectrum.This is getting towards the highest resolution meteor spectrum taken using the WATEC generation of video cameras.
A 600 groove/mm fused silica grating but the meteor was caught in the second order so roughly equivalent of a 1200 groove/mm grating in the first order. The double line at the sodium wavelength is genuine. It can be seen evolving in the video but I haven’t been able to identify what it is (yet) The system resolution, even in the second order, doesn’t have the ability to split the sodium doublet so it’s not that. Another interesting meteor mystery!
Fireball 2014 12 28 : 0450UT
Cheers,
Bill.