Sh 2-16

Sharpless 2-16
Nebula
H II region
	Sh 2-16 seen faintly behind the overlayed star cluster Collinder 347.
Observation data: epoch
Right ascension	17h 46m 37.2s
Declination	−29° 22′ 02″
Distance	1550±150 pc
Apparent diameter	12'
Constellation	Sagittarius
Designations	RCW 137, Gum 70, LBN 1124
	See also: Lists of nebulae

Last updated September 20, 2025

Sh 2-16 is an emission nebula in the constellation Sagittarius. It is ionized by the star LSS 4381. The nebula also contains an infrared cluster, [DB2000] 56.^[3] It is at the same location as open cluster Collinder 347 which is located closer than the nebula.

The region appears mostly red in visible light, making observation best through a Hydrogen-alpha filter.^[4]

References

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[1] "Sh 2-16".

[2] "Sharpless2-16 Lhargb_Hr".

[3] "Sh 2-16".

[4] "CCD Images of the Sharpless Catalog".

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[2]

[3]

[4]

v t e Gum Catalog
Colin Stanley Gum
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See also: Gum Nebula