Arp113(NGC67 , 68 , 69 , 70 , 71 , 72) in Andromeda Magnitude 13.5(NGC70) / 320million light-years L;5min×224 (2018/8/14, 15, 17, 9/7) R;5min×37 G;5min×37 B;5min×37 (2018/9/17, 18) 21cm f6.0 Newtonian ST8XME (星ナビ2019年1月号掲載)