The spectrum of comet C/2019 Y4 (ATLAS) taken with an ALPY600 spectrograph (R=600) and a newton 0.4-m f/4 telescope shows the different emission lines of this comet. There is a clear peak around 3880 Angstrom and then the different swan bands. There were 5 images of 20 min each that were processed/calibrated in BASS software. The instrument response was performed with the star HD55575 from the Miles catalogue and was close to the comet.