RASS image centred on the position of MCXC J0229.9-1316, an SGP cluster, previously without redshift. The green lines are the iso-contours from the wavelet-filtered RASS image, showing that the emission is extended. We identified this cluster with the [DZ2015] 408 group at ɀ = 0.0565 (Díaz-Giménez & Zandivarez 2015). Group spec-troscopic members are marked by magenta plusses and the group virial radius (R_rmvir = 13′) by a magenta circle. The group members are concentrated within R₅₀₀ (red circle). The relatively large offset between the optical and X–ray centre of D = 3.97′ = 0.42R₅₀₀ is due to the large angular size of the group, which lies at a very low redshift.