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Sh2-54 (Emission Nebula)


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Sh2-54
Emission Nebula (散光星雲)
Nb EN


別名 (Other names)

Sharpless 54, Sh 2-54, Gum 84, RCW 167, LBN 71, LBN 72, W35

星座 (Constellation)
へび座 (Ser) (Serpens)

座標 (Coordinates)
(18.7°, 2.0°)

距離 (Distance)
6,200光年 (6,200 light-years)

Sh2-54 (RCW 167) is an emission nebula located 6,200 light years from the Earth in the constellation Serpens.

Sh2-54 (Emission Nebula) : Picture

Sh2-54 (Emission Nebula)
Sh2-54 (Emission Nebula)
(C) Image by Dean Salman - http://www.sharplesscatalog.com
This is a large nebula that needs a bit of exposure to pick up the high contrast. There is no reflection nebula in the area, so the Hydrogen Alpha filter works very well here. It will look as if it is picking up very well, but it really needs the time to get good S/N. I would also use a lot of color RGB filters on this because the H-Alpha luminance will be very strong compared to what you will get with the RGB. I did not pick up much at all using a clear filter, so I stuck with the H-Alpha. This is a fairly large area, so you need a field of view around 3 degrees to get it all. However, the small brighter part of the nebula looks like a good object for a larger telescope capturing the fine detail of the small bright nebula seen on the lower left area.

Sh2-54 (Emission Nebula)
Sh2-54 (Emission Nebula)
(C) http://galaxymap.org/
This HII region is ionised by the young NGC 6604 star cluster, which includes the O5-8V+O5-8V+O8I supergiant multiple HD 167971 and the radio source W 35. It lies, unusually, about 70 parsecs above the galactic plane within the Ser OB2 association.

Ser OB2 contains over 100 OB stars with a common age of about 5 million years.

A good image of this nebula, which looks like a nest (Gum 84) carrying a tiny egg (Gum 85), can be seen here.

Sh2-54 (Emission Nebula)
Sh2-54 (Emission Nebula)
(C) Image by Dean Salman - http://www.sharplesscatalog.com
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