We study the close proximity of the well-known and well-studied 3C31 class FRI radio galaxy in order to reveal the influence of the environment on an extragalactic radio source. It was shown that about 110 million years ago the galaxies NGC 380 and NGC 386 were located near the galaxy NGC 383 (the parent galaxy of 3C31). On the other hand, the modeling of the spectral characteristics of the radio emission of the central part of the radio galaxy 3C31 gives an estimate of the age of the central jet of about 100 million years. Therefore, it can be assumed that one of the possible reasons for the appearance or resumption of the radioactivity of the galaxy NGC 383 may be a triple close passage of galaxies.

我们研究了众所周知且经过充分研究的 3C31 级 FRI 射电星系的邻近性，以揭示环境对河外射电源的影响。结果表明，大约1.1亿年前，星系NGC 380和NGC 386位于星系NGC 383（3C31的母星系）附近。另一方面，对射电星系3C31中心部分射电发射光谱特征的建模给出了中心射流年龄约为1亿年的估计。因此，可以推测NGC 383星系放射性出现或恢复的可能原因之一可能是星系的三重闭合通道。