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Sh2-5 (Emission Nebula)


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Sh2-5
Emission Nebula (散光星雲)
Nb EN


別名 (Other names)

Sharpless 5, Sh 2-5, RCW 123

星座 (Constellation)
さそり座 (Sco) (Scorpius)

座標 (Coordinates)
(348.97°, -0.54°)

距離 (Distance)

Sh2-5 (RCW 123) is an emission nebula in the constellation Scorpius.

Sh2-5 (Emission Nebula) : Picture

Sh2-5 (Emission Nebula)
Sh2-5 (Emission Nebula)
(C) Image by Dean Salman - http://www.sharplesscatalog.com
This bright and fairly good sized nebula images nicely without a hydrogen-alpha filter, but you should use a red as the luminance since it will do much better than a clear filter. There is not much green and blue to speak of here. Using the H-Alpha as a luminance will bring out the rich structure, but you need to take a lot of RGB to get good color balance since the H-Alpha will be so strong. Did not try an OIII filter on this one, but should work out. If you have a larger telescope with a smaller field of view, there seems to be nice structure near the brightest part of it. This is most likely where any OIII filter ought to pick this up if you try it. Sh2-5 sits in the middle of SH2-11 so with a wide field setup, you can easily capture both. This image was processed really to show SH2-5 so I did not process much with the surrounding nebula of SH2-11.

Sh2-5 (Emission Nebula)
Sh2-5 (Emission Nebula)
(C) http://galaxymap.org/
This large diffuse nebula lies in the same direction as the Wolf-Rayet star WR 89.

Infrared imagery reveals that RCW 123 (Sh 2-5) lies within an enormous bubble ionised by the star cluster Havlen-Moffat 1. This cluster is 2-4 million years old and contains the Wolf-Rayet stars WR 87 and WR 89 as well as several O-stars. Distance estimates place it in the Centaurus arm.

Sh2-5 (Emission Nebula)
Sh2-5 (Emission Nebula)
(C) Image by Dean Salman - http://www.sharplesscatalog.com
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