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Sh 2-54

Nebula in the constellation Serpens

Field	Value
name	Sh 2-54
image	The star cluster NGC 6604 and its surroundings.jpg
caption	Sh 2-54 nebula surrounding the star cluster NGC 6604
credit	ESO
type	H II region
epoch	J2000
ra
dec
dist_ly	6,200
size_v	140 arcmins
constellation	Serpens
radius_ly	126.25
names	RCW 167, Gum 84/85, W35, LBN 72

Sh 2-54 is an extended bright nebula in the constellation of Serpens.{{cite simbad | access-date=2011-06-05

In its core there are many protostars and many infrared sources; some of these sources, like IRAS 18151−1208, are most probably very young high-mass stars. The older star population in this region has an average age of 4–5 million years, and its components are grouped in the open cluster NGC 6604.

Sh 2-54 belongs to an extended nebulosity that includes also the Eagle Nebula and the Omega Nebula. The young high-mass stars of this region constitute the Serpens OB1 and Serpens OB2 OB association.

Gallery

Image:Serpent%E2%80%99s_Nebula.jpg|Serpent's Nebula

References

Sharpless, Stewart. (December 1959). "A Catalogue of H II Regions". Astrophysical Journal Supplement.
Davis, C. J.. (October 2004). "Collimated molecular jets from high-mass young stars: IRAS 18151-1208". Astronomy and Astrophysics.
Reipurth, B.. (December 2008). "The Young Cluster NGC 6604 and the Serpens OB2 Association". Handbook of Star Forming Regions, Volume II: The Southern Sky.
Sofue, Y.. (1986). "Giant stellar-wind shell associated with the H II region M16". Publications of the Astronomical Society of Japan.
"Serpent's Nebula".

Info: Wikipedia Source

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h-ii-regions serpens sharpless-objects star-forming-regions stellar-associations

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