21P/Giacobini–Zinner comet
21P/Giacobini–Zinner comet 21P/Giacobini–Zinner is passing by the Sun in Sep 2018. 2018-09-08 (KST, GMT+9:00), Hwacheon, Korea CCD: QHYCCD QHY16200A (-20°C) Telescope: Takahashi FSQ-106ED (d=106mm, fl=530mm, f/5.0) Filter: L, R, G, B Mount: CRUX-170HD with Titan TCS, QHYOAG-M+QHY5L-II, PHD2 autoguided Exposure L: 180s * 1 R: 180s * 1 G: 180s * 1 B: 180s * […]