Apparent airglow spectra observed in 6720 Å band. The 2022 spectra were recorded with a 0.5″ slit whereas, the 2024 spectra are recorded with a 1.3″ slit. Spectral lines found in Hanuschik (2003) are indicated with blue ticks, with the tick length indicating relative intensity. Locations of computed OH lines by van der Loo & Groenenboom (2007, 2008) are shown with orange ticks, with the tick length indicating the line’s Einstein coefficient. The noise floor is shown as a dashed gray line, and the spectral regions used for sampling the continuum are indicated in red.