Left: the 3′×3′ mapped area, sampled at 9′′ with the origin at the Orion H₂-Peak 1 position, i.e., α₂₀₀₀ = 05^h35^m1370, δ₂₀₀₀  = −05° 22′ 090. A core of intense emission is clearly seen just below the centre. Right: centred on (0′′, −18′′), this partial map demonstrates that the 219.17 GHz feature is a point source to the 28′′ beam. This weak spectral feature is identified inside the red markers. It is sitting on top of the red wing of a much stronger line (HC₃N (ν₇ = 3), Sutton et al. 1985).