NGC 6604
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| Image of the 2.2m ESO / MPG telescope . NGC 6604 can be seen at the top left, below it the HII region Sh2-54 in a reddish color. | |
| AladinLite | |
| Constellation | Snake |
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Position equinox : J2000.0 |
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| Right ascension | 18 h 18 m 02.9 s |
| declination | -12 ° 14 ′ 35 ″ |
| Appearance
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| classification | I3p |
| Brightness (visual) | 6.5 mag |
| Angular expansion | 6 ' |
| Physical data
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| distance | 5500 ly (1696 pc ) |
| history | |
| Discovered by | William Herschel |
| Discovery time | July 15, 1784 |
| Catalog names | |
| NGC 6604 • C 1815-122 • OCl 56 • Cr 373 • GC 4398 • H VIII 15 • h 3740 • MM 23, CTB 50, NRL 17, [KPR2004b] 439, Cl Mrk 39, LMH 24, OCISM 11 | |
NGC 6604 is an open star cluster of the Trumpler type I3p in the constellation Snake on the ecliptic, embedded in the HII region Sh2-54 . It has a brightness of 6.5 mag and an angular diameter of 6 arc minutes . The cluster is around 5,500 light years from the solar system.
The relatively young star cluster is the densest area of a star association called " Serpens OB " , which contains a total of around 100 stars of the spectral classes O and B, among them the blue supergiant HD 167971 .
The object was discovered on July 15, 1784 by William Herschel .
Web links
- ESO: A star cluster in a star cluster including photos, map & animations April 25, 2012
- astronews.com: An often overlooked star cluster April 25, 2012
- astronews.com: Picture of the day October 10, 2013
- Spektrum .de: amateur recordings [1]
Individual evidence
- ↑ NASA / IPAC EXTRAGALACTIC DATABASE
- ↑ a b c SEDS : NGC 6604
- ^ The star cluster NGC 6604 and its surroundings . In: ESO Press Release . Retrieved April 26, 2012.
- ↑ raumfahrer.net
- ↑ Seligman