Astronomy:Sh 2-18
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| 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 | 17h 48m 48s |
| 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 |
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
- ↑ "SIMBAD query result". https://simbad.u-strasbg.fr/simbad/sim-id?Ident=Sh%202-18&NbIdent=1&Radius=10&Radius.unit=arcmin&CooFrame=FK5&CooEpoch=2000&CooEqui=2000&output.max=all&o.catall=on&output.mesdisp=N&Bibyear1=1983&Bibyear2=2005&Frame1=FK5&Frame2=FK4&Frame3=G&Equi1=2000.0&Equi2=1950.0&Equi3=2000.0&Epoch1=2000.0&Epoch2=1950.0&Epoch3=2000.0.
- ↑ "Sharpless (Sh2) - Astrobasics". 13 September 2022. https://astrobasics.de/galerie/kataloge/sh2/#object-10430.
- ↑ "Sh 2-18". http://galaxymap.org/cat/view/sharpless/18.
- ↑ "CCD Images of the Sharpless Catalog". http://www.sharplesscatalog.com/sharplessdata.aspx.
category:sagittarius (constellation)
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