NGC6888 Cresent Nebula

彎月星雲

NGC6888 彎月星雲 - 哈勃色盤
http://www.astrocafe.hk/viewtopic.php?f=17&t=4139

Officina Stellare 500 RiFast (1900 f3.8)
FLI Proline 16803
Astrodon 5nm Ha, 3nm SII, OIII

OIII = 5x1800s
Ha = 5x1800s
SII = 8x1800s

總曝光9小時，攝於西藏遙控天文台。