Sh 2-31

Sharpless 2-31
Emission nebula
H II region
	Sh 2-31 (lower right) and Sh 2-32 (center)
Observation data: J2000 epoch
Right ascension	18h 09m 42s
Declination	23° 59′ 17″
Distance	1500 pc
Apparent dimensions (V)	1.63° x 1.12°
Constellation	Sagittarius
Designations	CED 154b, Gum 75, h 1996, IC 1274, LBN 33
	See also: Lists of nebulae

Last updated October 01, 2025

Sh 2-31, also known by the designation IC 1274, is an emission nebula in the constellation Sagittarius. It is ionized by the stars HD 165921 and HD 166107.^[2] Sh 2-31 is located very close to the Lagoon Nebula.^[3]

Discovery

Sh 2-31 was discovered, along with nearby Sh 2-29, by John Herschel on 1st July 1826. He listed it as 'h 1996'. In 1833, he re-discovered it, this time labeling it as 'h 3733'. The distinction between the various nebulae of the region would not be established until 1892, when Edward Emerson Barnard photographed that region of the sky.

References

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[1] ttps://www.irida-observatory.org/CCD/IC1274/IC1274.html

[2] "Sh 2-31".

[3] ttp://panther-observatory.com/gallery/deepsky/doc/M8_wide.htm

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[2]

[3]

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