Flux-calibrated spectrum of comet 103P/Hartley 2 acquired on October 27, 2010 where the strongest cometary emissions in the optical range (CN, C₂, C₃, and NH₂) are marked. The slit was positioned as indicated in Fig. 1. The spatial scale covers from the optocentre up to  ~12   000 km in both directions. The spatial resolution is  ~23 km/pix. The spectral wavelength range runs from 366.0 to 780.3 nm with resolution 0.33 nm/pix. The colour code stretches from 0 to 5 × 10^-16 erg   cm^-2   s^-1   Å^-1.