C 9 Cave Nebula (Sh2-155)

emission nebula

C 9 Cave Nebula (Sh2-155), HOO
C9 Cave Nebula D3 PixInsight HOO 20261018+1019+1020.jpg Full resolution · 1700×1150 · 1.0 MB
C 9 Cave Nebula (Sh2-155), natural
C9 Cave Nebula D3 PixInsight 20261018+1019+1020.jpg Full resolution · 1700×1150 · 1.3 MB
Integration
4.5 h of 4 h goal · done
Nights
3 · 2026-10-18 – 2026-10-20
Scopes
Dwarf 3
Filters
Duo-Band
Distance
about 2,400 light-years
Light left it
around 374 BC
Read more
Sh 2-155 on Wikipedia

Other versions

C 9 Cave Nebula (Sh2-155), other version 1
C9 Cave Nebula D3 PixInsight 20261018+1019+1020 wide.jpg Full resolution · 3816×2136

Sessions

NightScopeFilterFrames × expHours
2026-10-18Dwarf 3D3Duo-Band4 × 60 s0.07
2026-10-18Dwarf 3D3Duo-Band75 × 60 s1.25
2026-10-19Dwarf 3D3Duo-Band44 × 60 s0.73
2026-10-19Dwarf 3D3Duo-Band73 × 60 s1.22
2026-10-20Dwarf 3D3Duo-Band71 × 60 s1.18
Total stacked4.45

Frames the scope stacked, not frames taken. Night = local evening the session started.