| 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″[1] |
| Distance | 1550±150 pc |
| Apparent magnitude (V) | 15.23[2] |
| Apparent diameter | 12'[3] |
| Constellation | Sagittarius |
| Physical characteristics | |
| Radius | 28 ly |
| Designations | RCW 137,Gum 70,LBN 1124 |
| See also:Lists of nebulae | |
Sh 2-16 is anemission nebula in the constellationSagittarius. 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 aHydrogen-alpha filter.[5]
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