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Sh2-16 (Emission Nebula)


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Sh2-16
Emission Nebula (散光星雲)
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別名 (Other names)

Sharpless 16, Sh 2-16, RCW 137, Gum 70, LBN 1124

星座 (Constellation)
いて座 (Sgr) (Sagittarius)

座標 (Coordinates)
(0.0°, -0.6°)

距離 (Distance)
4,900光年 (4,900 light-years)

Sh2-16 (RCW 137) is an emission nebula located 4,900 light years from the Earth in the constellation Sagittarius.

Sh2-16 (Emission Nebula) : Picture

Sh2-16 (Emission Nebula)
Sh2-16 (Emission Nebula)
(C) Image by Dean Salman - http://www.sharplesscatalog.com
The cluster of Sharpless objects is also located where the galactic center of the galaxy is located. In this image it is located in the upper right corner of the image. Sharpless 19 is in the middle of the image while Sh2-18 is the smaller one to the lower right. In the lower right from Sh2-18 is Sh2-16. The upper left of the image is where Sh2-20 is located leaving Sh2-17 in the upper right. This area is rich in hydrogen alpha so a nice long exposure will pick up nice contrast. Most of the region is mostly red so getting a HA-RGB color image is fairly easy.

Sh2-16 (Emission Nebula)
Sh2-16 (Emission Nebula)
(C) http://galaxymap.org/
Sh 2-16 is part of the Sh 2-15 to Sh 2-20 complex of HII regions located in the Sgr OB5 association in the Sagittarius arm. It appears to be ionised by the O9.5 V star LSS 4381.

Avedisova concludes that this HII region is ionised by the O9.5 V star LSS 4381. She places Sh 2-16 in star formation region SFR 359.79-0.35 with the infrared source IRAS 17433-2921 and the star cluster VDBH 222.

Sh2-16 (Emission Nebula)
Sh2-16 (Emission Nebula)
(C) Naoyuki Kurita

Sh2-16 (Emission Nebula)
Sh2-16 (Emission Nebula)
(C) Image by Dean Salman - http://www.sharplesscatalog.com
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