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不同滤镜的北美
Photographer
承德塞罕坝天文台
分别用 dwarf3 的天文滤镜和双窄带滤镜拍摄。四片马赛克拼接，BCF 共 12 小时，双窄共 8 小时。
Equipment
Cameradwarf3
Telescope/Lensdwarf3
Shooting Data ( Shooting Date: 2026-07-13 )
Total FramesN/A
Exposure共 20h
Sky Coordinates
Right Ascension (RA)20h 58m 55.8s
Declination (Dec)+44° 20′ 43.1″
FOV Radius2.9018° (174.11′)
Pixel Scale2.776″/px
Rotation Angle0.70° E of N (Clockwise)
Parity正像
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