NGC6888 Cresent Nebula
弯月星云
NGC6888 弯月星云 - 哈勃色盘
Officina Stellare 500 RiFast (1900 f3.8)
FLI Proline 16803
Astrodon 5nm Ha, 3nm SII, OIII
OIII = 5x1800s
Ha = 5x1800s
SII = 8x1800s
总曝光9小时,摄于西藏遥控天文台。