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Sh2-74 (Emission Nebula)


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Sh2-74
Emission Nebula (散光星雲)
Nb EN


別名 (Other names)

Sharpless 74, Sh 2-74, RCW 182, LBN 109, Avedisova 707

星座 (Constellation)
わし座 (Aql) (Aquila)

座標 (Coordinates)
(39.9°, -1.3°)

距離 (Distance)
10,120光年 (10,120 light-years)

Sh2-74 (RCW 182) is an emission nebula located 10,120 light years from the Earth in the constellation Aquila.

Sh2-74 (Emission Nebula) : Picture

Sh2-74 (Emission Nebula)
Sh2-74 (Emission Nebula)
(C) Image by Dean Salman - http://www.sharplesscatalog.com
This nebula is not very large but does fairly well with the hydrogen alpha filter. A larger telescope may pick up a bit more structure and details in the darker area. A wider field of view will pick up the dim nebula around SH2-74, but this area is even fainter. The color detail was very weak so stealing some of the details from the H-Alpha to colorize the image. The oxygen III filter did not pick up any detail in a 15 minute image so I am not sure a narrowband color image will work for this object.

Sh2-74 (Emission Nebula)
Sh2-74 (Emission Nebula)
(C) http://galaxymap.org/
This nebula is ionised by the O9V class Sherwood 182. It is either at the same distance as the powerful radio source W 50, or sits in front of it, depending upon the authority.

Both W 50 and Sh 2-74 can be seen in this radio image. This image suggests that W 50 is a distinct object but might be joined to Sh 2-74 by a spur visible at radio frequencies.

The microquasar SS 433 is part of W 50. This bizarre object, also called V1343 Aquilae, is spewing out two jets of material at more than one-quarter the speed of light.

Sh2-74 (Emission Nebula)
Sh2-74 (Emission Nebula)
(C) Palomar Observatory

Sh2-74 (Emission Nebula)
Sh2-74 (Emission Nebula)
(C) Image by Dean Salman - http://www.sharplesscatalog.com
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