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Sh2-58 (Emission Nebula)


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Sh2-58
Emission Nebula (散光星雲)
Nb EN


別名 (Other names)

Sharpless 58, Sh 2-58, RCW 171, LBN 79

星座 (Constellation)
たて座 (Sct) (Scutum)

座標 (Coordinates)
(23.1°, 0.6°)

距離 (Distance)

Sh2-58 (RCW 171) is an emission nebula in the constellation Scutum.

Sh2-58 (Emission Nebula) : Picture

Sh2-58 (Emission Nebula)
Sh2-58 (Emission Nebula)
(C) Image by Dean Salman - http://www.sharplesscatalog.com
This small sharpless object has some very nice structure in it which a larger telescope should be able to bring out better than is what seen here. The nebula responds very well to the hydrogen-alpha filter. With a long exposure using the color RGB filters, you can create a nice HA-RGB image of this object. Also seen here is SH2-57 which is smaller and dimmer than the larger SH2-58. I did try a sub frame using the oxygen III filter but did not pick up anything to justify doing a color narrowband image. A wider field of view will also show more of the Milky Way which will display a better contrast with the darker areas seen in this image.

Sh2-58 (Emission Nebula)
Sh2-58 (Emission Nebula)
(C) http://galaxymap.org/
No ionising star has been identified in the scientific literature for Sh 2-58, which is prominent in infrared as the bubble [CPA2006] N30 as well as in radio.

Avedisova includes Sh 2-58 in the star formation region SFR 23.13+0.55, along with the molecular cloud SYCSW 317 and the compact radio HII region [L89b] 23.115+0.556.

Sh 2-57 and Sh 2-58 are visible together in the sky (as shown by this hydrogen-alpha image), divided by the dark nebula LDN 446 and just east of the Scutum Supershell. However, they seem to be located at quite different distances, with Sh 2-58 at about the same distance as the Supershell and Sh 2-57 in front of this region.

Sh2-58 (Emission Nebula)
Sh2-58 (Emission Nebula)
(C) Image by Dean Salman - http://www.sharplesscatalog.com
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