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We have studied the radial distribution of the early (E/S0) and late (S/Irr) types of satellites around bright host galaxies. We made a volume‐limited sample of 4986 satellites brighter than   M  r =−18.0  associated with 2254 hosts brighter than   M  r =−19.0  from the Sloan Digital Sky Survey Data Release 5 sample. The morphology of satellites is determined by an automated morphology classifier, but the host galaxies are visually classified. We found segregation of satellite morphology as a function of the projected distance from the host galaxy. The amplitude and shape of the early‐type satellite fraction profile are found to depend on the host luminosity. This is the morphology–radius/density relation at the galactic scale. There is a strong tendency for morphology conformity between the host galaxy and its satellites. The early‐type fraction of satellites hosted by early‐type galaxies is systematically larger than that of late‐type hosts, and is a strong function of the distance from the host galaxies. Fainter satellites are more vulnerable to the morphology transformation effects of hosts. Dependence of satellite morphology on the large‐scale background density was detected. The fraction of early‐type satellites increases in high‐density regions for both early‐ and late‐type hosts. It is argued that the conformity in morphology of galactic satellite system is mainly originated by the hydrodynamical and radiative effects of hosts on satellites.

Galactic satellite systems: radial distribution and environment dependence of galaxy morphology