NGC 188
AladinLite | |
Constellation | Cepheus |
Position equinox : J2000.0 |
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Right ascension | 00 h 47 m 27.5 s |
declination | + 85 ° 16 ′ 11 ″ |
Appearance
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classification | II 2 r |
Brightness (visual) | +8.1 mag |
Brightness (B-band) | +8.91 mag |
Angular expansion | 15.0 ' |
Number of stars | approx. 5000 |
Brightest star | +12 likes |
Variable stars | > 50, e.g. B. EP Cep, EQ Cep, ER Cep, ES Cep, V372 Cep |
Redness ( excess color E (BV)) | 0.082 |
Physical data
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distance | approx. 6700 ly (approx. 2000 pc ) |
Age | about 6.4 billion years |
Metallicity [Fe / H] | −0.02 |
history | |
Discovered by | John Herschel |
Discovery time | November 3, 1831 |
Catalog names | |
NGC 188 • C 0039 + 850 • OCl 309 • Mel 2 • Cr 6 • Lund 28 • GC 92 • h 34 • Raab 1 |
NGC 188 is the name of an open star cluster in the constellation of Cepheus . At over five billion years old, it is one of the oldest open star clusters in the Milky Way . The star cluster consists of around 5000 stars.
The open star cluster NGC 188 was discovered by the British astronomer John Frederick William Herschel on November 3, 1831 and added to his catalog by him two years later.
Web links
Commons : NGC 188 - collection of images, videos, and audio files
Individual evidence
- ↑ NASA / IPAC EXTRAGALACTIC DATABASE
- ^ A b Students for the Exploration and Development of Space
- ↑ SIMBAD database
- ^ A Star Catalog for the Open Cluster NGC 188
- ↑ a b A site Devoted to Stellar Clusters in the Galaxy and the Magellanic Clouds
- ↑ Seligman