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Sh2-4 (Emission Nebula)


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Sh2-4
Emission Nebula (散光星雲)
Nb EN


別名 (Other names)

Sharpless 4, Sh 2-4, RCW 121

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

座標 (Coordinates)
(348.2°, -1.0°)

距離 (Distance)

Sh2-4 (RCW 121) is an emission nebula in the constellation Scorpius.

Sh2-4 (Emission Nebula) : Picture

Sh2-4 (Emission Nebula)
Sh2-4 (Emission Nebula)
(C) Image by Dean Salman - http://www.sharplesscatalog.com
This small and bright nebula has some interesting structure around the brighter area that a large telescope. The nebula has some brighter areas around it that allow the wide field telescopes to pick up some interesting nebulae in the area. The nebula does well with the hydrogen-alpha and the red filter. There was very little blue and green that picked up so the region is quite a bit on the red site.

Sh2-4 (Emission Nebula)
Sh2-4 (Emission Nebula)
(C) http://galaxymap.org/
Infrared imagery reveals that RCW 121 (Sh 2-4) and RCW 122 lie at the edge of 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.

Sh2-4 (Emission Nebula)
Sh2-4 (Emission Nebula)
(C) Image by Dean Salman - http://www.sharplesscatalog.com
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