M57，环状星云
Astrobin IOTD 20250731
-
相机 miniCAM8M
-
曝光时长 6h 55'
望远镜: Askar 185 APO
赤道仪: Astro-physics Mach2 GTO
曝光时间: 共计6h 55m
Hα: 1h 55m (23 × 300″)
SII: 1h 35m (19 × 300″)
OIII: 1h 45m (21 × 300″)
ArIII: 1h 40m (20 × 300″)
颜色:
[OIII] = Blue；[ArIII] = Green；[SII] = Yellow；[Hα] = Red；Sky + Galaxies — HOO；Stars — AOO
作者.
Nico Carver
