M17 Region in Sagittarius (Jim Thommes)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: M 17 · NGC 6618 · Omega nebula

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M17 Region in Sagittarius

Link: http://www.jthommes.com/Astro/M17.htm

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M17 Region in Sagittarius

Link: http://www.jthommes.com/Astro/M17.htm

North is up in this image. Central in this image is the emission / reflection nebula M17. It is also known as Sharpless 45, Gum 81a. Embedded in the nebula is the young star cluster NGC 6618. This is a very energetic region of a larger molecular cloud known as (M17SW). The NGC 6618 cluster contains over 800 stars; 100 of them are hotter than B9. This is compared to the Orion Nebula which has 8 such stars; NGC6618 also has 25 time the UV flux than that of the Orion nebula so this region is a very energetic space. Just to the right is a brighter area cataloged as Gum 81b. These two bright areas are part of the same structure and they are bisected by a dark lane running between them. There is the overriding large dark nebula known as LDN 359 of which only about a quarter of it lies in this image. These objects and some of the brighter stars are identified in the annotated image. M17's distance from Earth is estimated to be between 4,300 to 6,000 light years lying in the Sagittarius or Sagittarius-Carina arm of the Milky Way. Horizontal FOV is 88'

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M17 Region in Sagittarius

M17 Region in Sagittarius

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