Sh 2-16

Sharpless 2-16
Nebula
H II region
	Sh 2-16 seen faintly behind the overlaid star cluster Collinder 347.
Observation data: epoch
Right ascension	17h 46m 37.2s
Declination	−29° 22′ 02″
Distance	1550±150 pc
Apparent magnitude (V)	15.23
Apparent diameter	12'
Constellation	Sagittarius
Physical characteristics
Radius	28 ly
Designations	RCW 137, Gum 70, LBN 1124

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.^[4] 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.^[5]

References

^ "Sh 2-16".
^ "Sharpless (Sh2) - Astrobasics". 13 September 2022.
^ "Sharpless2-16 Lhargb_Hr".
^ "Sh 2-16".
^ "CCD Images of the Sharpless Catalog".

[1] "Sh 2-16".

[2] "Sharpless (Sh2) - Astrobasics". 13 September 2022.

[3] "Sharpless2-16 Lhargb_Hr".

[4] "Sh 2-16".

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

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[2]

[3]

[4]

[5]

Gum Catalog
Colin Stanley Gum
Gum 1 Gum 2 Gum 3 Gum 4 Gum 5 Gum 6 Gum 7 Gum 8 Gum 9 Gum 10 Gum 12 Gum 13 Gum 14 Gum 15 Gum 16 Gum 17 Gum 18 Gum 19 Gum 20 Gum 21 Gum 22 Gum 23 Gum 24 Gum 25 Gum 26 Gum 27 Gum 28 Gum 29 Gum 30 Gum 31 Gum 32 Gum 33 Gum 34 Gum 35 Gum 36 Gum 37 Gum 38 Gum 39 Gum 40 Gum 41 Gum 42 Gum 43 Gum 44 Gum 45 Gum 46 Gum 47 Gum 48 Gum 49 Gum 50 Gum 51 Gum 52 Gum 53 Gum 54 Gum 55 Gum 56 Gum 57 Gum 58 Gum 59 Gum 60 Gum 61 Gum 62 Gum 63 Gum 64 Gum 65 Gum 66 Gum 67 Gum 68 Gum 69 Gum 70 Gum 71 Gum 72 Gum 73 Gum 74 Gum 75 Gum 76 Gum 77 Gum 78 Gum 79 Gum 80 Gum 81 Gum 82 Gum 83 Gum 84 Gum 85
See also: Gum Nebula, RCW Catalogue