NGC 4147
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Globular cluster NGC 4147 |
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| Photo from the Hubble Space Telescope | |
| AladinLite | |
| Constellation | Berenike's hair |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 12 h 10 m 06.2 s |
| declination | + 18 ° 32 ′ 32 ″ |
| Appearance | |
| Concentration class | VI |
| Brightness (visual) | 10.4 mag |
| Brightness (B-band) | 11 likes |
| Angular expansion | 4.4 ' |
| Physical data | |
| Affiliation | Milky Way |
| Metallicity [Fe / H] | −1.8 |
| history | |
| discovery | William Herschel |
| Discovery date | February 15, 1784 |
| Catalog names | |
| NGC 4147 • C 1207 + 188 • GCl 18 • GC 2752 • 2MASX J12100614 + 1832317 • HI 19 • h 1106 | |
NGC 4147 = NGC 4153 is a galactic globular cluster in the constellation Coma Berenices with an apparent visual magnitude of 10.4 mag. The cluster is one of the smallest and most star-poor representatives of its object class within the Milky Way , its total mass is estimated to be only around 40,000 solar masses - about a tenth of the mass of an average globular cluster and has an estimated diameter of max. 100 light years. It is located at an estimated 60,000 ly. From the solar system and 70,000 ly. From the Galactic Center .
He was discovered by William Herschel on February 15th . It is believed that Herschel's observation, which would later lead to entry NGC 4153 in the New General Catalog , had this object as its subject.
literature
- Sandage, AR & Walker, MF: "The globular cluster NGC 4147" ; in: Astronomical Journal, Vol. 60, p. 230 (1955)