Sh 2-43
| Nebula | |
|---|---|
| Observation data: epoch | |
| Right ascension | 18h 16m 24.00s |
| Declination | −17° 30′ 60.0″ |
| Distance | 5,200 ly (1,600 pc) |
| Constellation | Sagittarius |
| Designations | Sh 2-43, RCW 156 |
Sh 2-43 also known as RCW 156, is an emission nebula located in the constellation of Sagittarius. It is a faint, diffuse region of ionized hydrogen gas, potentially representing a localized concentration within a broader area of interstellar emission. It lies in a relatively empty patch of sky, bordered by several OB associations including Sgr OB1, Sgr OB7, and Sct OB3.