NGC 188

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Open star cluster
NGC 188
NGC 188.jpg
AladinLite
Constellation Cepheus
Position
equinox : J2000.0
Right ascension 00 h 47 m 27.5 s
declination + 85 ° 16 ′ 11 ″
Appearance

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

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

  1. NASA / IPAC EXTRAGALACTIC DATABASE
  2. ^ A b Students for the Exploration and Development of Space
  3. SIMBAD database
  4. ^ A Star Catalog for the Open Cluster NGC 188
  5. a b A site Devoted to Stellar Clusters in the Galaxy and the Magellanic Clouds
  6. Seligman