Astronomy:NGC 6139
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Short description: Globular cluster located in the constellation of Serpens
| NGC 6139 | |
|---|---|
 NGC 6139, imaged by the Hubble Space Telescope | |
| Observation data (J2000 epoch) | |
| Class | II[1] |
| Constellation | Scorpius |
| Right ascension | 16h 27m 41.6s[2] |
| Declination | –38° 50′ 18″[2] |
| Distance | 10.1 kiloparsecs (30 kilolight-years)[3] |
| Apparent magnitude (V) | +9.68[4] |
| Apparent dimensions (V) | 1.6′ x 1.4′[4] |
| Physical characteristics | |
NGC 6139 is a globular cluster of the Milky Way in the constellation Scorpius. It is located 3.6 kiloparsecs (10 kilolight-years) from the Galactic Center[3] (less than half the distance of the Sun from the Galactic Center).
Visibility
The cluster appears visibly small and requires larger +12" aperture telescopes to view the core. Appearing around 1.5 arcmins having a radius of .75 arcmins, despite its rather bright magnitude.
Visibility
Globular clusters are denser and more spherical than open star clusters.[5]
References
- ↑ "Results for NGC 6139". VizieR Catalogue Database. http://vizier.cfa.harvard.edu/viz-bin/VizieR-5?-out.all=1&-source=VII/1B&-c=NGC+6139,rm=5.0.
- ↑ 2.0 2.1 "NED Results for NGC 6139". NASA/IPAC Extragalactic Database. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC+6139.
- ↑ 3.0 3.1 Harris, William E. (1996). "A Catalog of Parameters for Globular Clusters in the Milky Way (2010 edition)". Astronomical Journal 112: 1487. doi:10.1086/118116. http://physwww.mcmaster.ca/~harris/mwgc.dat.
- ↑ 4.0 4.1 "NGC 6139". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+6139.
- ↑ "An aging beauty". http://www.spacetelescope.org/images/potw1826a/.
External links
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