Sh 2-18

Sharpless 2-18

Emission nebula
H II region
The location of Sh 2-18 in the sky, (in the open source Stellarium software)
Observation data: J2000 epoch
Right ascension	17^h 48^m 48^s
Declination	−29° 15′ 0″[1]
Distance	4,890 ly
Apparent magnitude (V)	15.51
Apparent dimensions (V)	4' x 4'[2]
Constellation	Sagittarius
Physical characteristics
Radius	6 ly
Designations	RCW 139, LBN 1125
See also: Lists of nebulae

Sh 2-18 is an emission nebula in the constellation Sagittarius. It is part of the Sharpless Catalog assembled by Stewart Sharpless. It lies next to Sh 2-19. It contains the infrared cluster [DB2000] 1.^[3] The nebula appears to be circular in shape. ^[4]

References

1. "SIMBAD query result".
2. "Sharpless (Sh2) - Astrobasics". 13 September 2022.
3. "Sh 2-18".
4. "CCD Images of the Sharpless Catalog".