NGC 2298
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Globular cluster NGC 2298 |
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| Hubble image of NGC 2298 | |
| AladinLite | |
| Constellation | Aft deck of the ship |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 06 h 48 m 59.2 s |
| declination | -36 ° 00 ′ 19 ″ |
| Appearance | |
| Concentration class | VI |
| Brightness (visual) | 9.3 mag |
| Angular expansion | 5 ′, 0 |
| Physical data | |
| Affiliation | Milky Way ( Canis Major Dwarf Galaxy ) |
| Redshift | +0.000498 ± 0.000004 |
| Radial velocity | (+149.4 ± 1.3) km / s |
| distance | 30 kLj (9.3 kpc ) |
| Absolute brightness | −6.3 mag |
| Age | (12.9 ± 1.4) billion years |
| Metallicity [Fe / H] | −1.85 |
| history | |
| discovery | James Dunlop |
| Discovery date | May 8, 1826 |
| Catalog names | |
| NGC 2298 • C 0647-359 • GCl 11 • ESO 366-SC22 • Dun 578 • GC 1463 • h 3065 | |
NGC 2298 is a globular cluster in the constellation Puppis and has an angular extent of 6 ′, 8 and an apparent magnitude of 9.3 mag. The core radius is 16 ″, 3, the surface brightness 18.7 mag / arcsec 2 .
The star cluster was discovered by James Dunlop on May 8, 1826 .
Individual evidence
- ↑ NASA / IPAC EXTRAGALACTIC DATABASE
- ↑ Harlow Shapley, Helen B. Sawyer: A Classification of Globular Clusters . In: Harvard College Observatory Bulletin . tape 849 , 1927, pp. 11-14 , bibcode : 1927BHarO.849 ... 11S .
- ↑ van den Bergh et al .: "Diameters of Galactic globular clusters"; in: Astrophysical Journal, Vol. 375, pp. 594ff. bibcode : 1991ApJ ... 375..594V
- ↑ SEDS : NGC 2298
- ↑ SIMBAD database
- ^ Dinescu et al .: "Space Velocities of Globular Clusters. III. Cluster Orbits and Halo Substructure"; in: The Astronomical Journal, Vol. 117, Issue 4, pp. 1792ff. bibcode : 1999AJ .... 117.1792D
- ^ Forbes et al .: "The Globular Cluster System of the Canis Major Dwarf Galaxy"; in: The Astronomical Journal, Vol. 127, Issue 6, pp. 3394ff. bibcode : 2004AJ .... 127.3394F
- ^ A b M. Salaris, A. Weiss: "Homogeneous age dating of 55 Galactic globular clusters. Clues to the Galaxy formation mechanisms."; in: Astronomy and Astrophysics, Vol. 388, pp. 492ff. bibcode : 2002A & A ... 388..492S
- ↑ E. Noyola, K. Gebhardt: "Surface Brightness Profiles of Galactic Globular Clusters from Hubble Space Telescope Images"; in: The Astronomical Journal, Vol. 132, Issue 2, pp. 447ff. bibcode : 2006AJ .... 132..447N
- ↑ Seligman