The Cave Nebula

2014 Version:

Cave Nebula, SH2-155

The Cave Nebula LRGB

Distance: 2,400 Light Years Telescope: Takahashi TOA-130
Magnitude: 7.7 Camera: QSI 683
Size: 45’x50’ Arc-minutes Mount: AP 1100
Age: Not Known Exposures: L 20×600 Bin 1 RGB 20×300 Bin 2

Cave Nebula, SH2-155

The Cave Nebula SHO Version

Distance: 2,400 Light Years Telescope: Takahashi TOA-130
Magnitude: 7.7 Camera: QSI 683
Size: 45’x50’ Arc-minutes Mount: AP 1100
Age: Not Known Exposures: SII 25×900 Ha 25×900, OIII 25×900

 

2013 Version:

Cave Nebula, SH2-155, Caldwell 9

The Cave Nebula

 

Distance: 2,400 Light Years                        Telescope: Televue NP101

Magnitude:  7.7                                              Camera: QSI 683

Size:  45’x50’ Arc-minutes                         Mount: AP 900

Age: Not Known                                            Exposures: SII 12×1200 Ha 19×1200, OIII 11×1200

The Cave Nebula, also known as SH2-155 or Caldwell 9, is an emission nebula that also contains a large dark nebula and smaller reflection nebula. It is located in the constellation of Cepheus and is about 2,400 light years away. The dark nebula also known as LBN 529 forms the cave part of the nebula and its shape stands out from the contrasting emission nebula on the curved part of the cave. The source of illumination is a group of young stars called the Cepheus OB3 Association. These stars are very young at an estimated age of 100,000 years. LBN 527 is just to the right of the cave area.

Also in the field of view is LBN 524. It is a dark nebula that appears to the  lower right of the Cave Nebula. Also in this same area are dark nebula LDN 1215 and LDN 1216. On the other side of the Cave is dark nebula  LDN 1218.

[Wikipedia, The Calwell Objects by Stephen James O’Meara, The SkyX]

Ha Version 19×1200:

Cave Nebula, SH2-155, Caldwell 9

The Cave Nebula Ha

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