望远镜: Officina Stellare RiDK 400mm
赤道仪: Paramount MEII
曝光: L: 9.5hrs, R: 7.5 hrs, G: 4.5 hrs, B: 5hrs2×2 binning0.56 arcsec/pixel
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史蒂芬五重星系(IOTD 20230801) 望远