| Emission nebula | |
|---|---|
| H II region | |
|   The bow shock around Zeta Ophiuchi  | |
| Observation data: J2000 epoch | |
| Right ascension | 16h 35m 56s | 
| Declination | −12° 43′ 05″ [1] | 
| Distance | 550 ly | 
| Apparent dimensions (V) | 10° x 15° [2] | 
| Constellation | Ophiuchus [3] | 
| Designations | LBN 24, Gum 73 | 
| See also: Lists of nebulae | |
Sh 2-27 is an emission nebula in the constellation Ophiuchus. It is extended around the region containing the star Zeta Ophiuchi. The star produces a notable bow shock. [4] The nebula is very faint, but very large in the sky. It is a portion of the Rho Ophiuchi cloud complex.
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