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Sh2-72 (Emission Nebula)


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Sh2-72
Emission Nebula (散光星雲)
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別名 (Other names)

Sharpless 72, Sh 2-72, RCW 179, LBN 104, Avedisova 655

星座 (Constellation)
わし座 (Aql) (Aquila)

座標 (Coordinates)
(36.4°, -1.7°)

距離 (Distance)
5,870光年 (5,870 light-years)

Sh2-72 (RCW 179) is an emission nebula located 5,870 light years from the Earth in the constellation Aquila.

Sh2-72 (Emission Nebula) : Picture

Sh2-72 (Emission Nebula)
Sh2-72 (Emission Nebula)
(C) Image by Dean Salman - http://www.sharplesscatalog.com
Aquila which tends to be ignored by imagers with the exception of a few objects is quite rich with nice nebula. SH2-72 is such an object as it responds very well to a hydrogen-alpha filter. The nebula also has some nice structure that larger telescopes can easily define. Seen barely in the image on the lower right is a small globular cluster known as NGC 6749. However, just outside this field of view is SH2-71 which is a very nice planetary. It is so close that if I had rotated this image 90 degrees both objects would have been in the image, something to consider when going after SH2-72. The RGB came out rather faint so mixing the H-Alpha with the RGB really helps create a nice HA-RGB image.

Sh2-72 (Emission Nebula)
Sh2-72 (Emission Nebula)
(C) http://galaxymap.org/
This relatively large HII region might be ionised by the B0.5 IV star BD +2 3762 according to Forbes, but this is uncertain.

This nebula is prominent at radio frequencies as can be seen in this Effelsberg image and this VLA image and lies at the centre of a faint infrared ring as can be seen in MSX.

Sh2-72 (Emission Nebula)
Sh2-72 (Emission Nebula)
(C) Palomar Observatory

Sh2-72 (Emission Nebula)
Sh2-72 (Emission Nebula)
(C) Image by Dean Salman - http://www.sharplesscatalog.com
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