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Sh2-104 (Emission Nebula)


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Sh2-104
Emission Nebula (散光星雲)
Nb EN


別名 (Other names)

Sharpless 104, Sh 2-104, LBN 195, Avedisova 956

星座 (Constellation)
はくちょう座 (Cyg) (Cygnus)

座標 (Coordinates)
(74.74°, 0.61°)

距離 (Distance)
14,300光年 (14,300 light-years)

Sh2-104 is an emission nebula located 14,300 light years from the Earth in the constellation Cygnus.

Sh2-104 (Emission Nebula) : Picture

Sh2-104 (Emission Nebula)
Sh2-104 (Emission Nebula)
(C) Image by Dean Salman - http://www.sharplesscatalog.com
Sharpless 104 is a small but has a great structure for larger telescopes and is fairly bright. It responds to the hydrogen-alpha filter very well so it makes a great HA-RGB image. The H-Alpha channel is so strong you will need to expose the RGB a lot more than usual. There is a lot of nebula that a wide field telescope can capture where the right framing can give the image more contrast as seen here. I did not get much in the oxygen III so I do not think this would make a good color narrowband image.

Sh2-104 (Emission Nebula)
Sh2-104 (Emission Nebula)
(C) http://galaxymap.org/
Avedisova gives a slightly cooler O6V class for the main ionising star. She places Sh 2-104 in the star forming region SFR 74.74+0.61 with the star cluster Dolidze 4 and the HII region DWB 14.

Sh2-104 (Emission Nebula)
Sh2-104 (Emission Nebula)
(C) Palomar Observatory

Sh2-104 (Emission Nebula)
Sh2-104 (Emission Nebula)
(C) Image by Dean Salman - http://www.sharplesscatalog.com
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