NGC 6456
| Galaxy NGC 6456 |
|
|---|---|
|
|
| SDSS recording | |
| AladinLite | |
| Constellation | Dragon |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 17 h 42 m 31.8 s |
| declination | + 67 ° 35 ′ 32 ″ |
| Appearance | |
| Morphological type | E3 |
| Brightness (visual) | 14.7 mag |
| Brightness (B-band) | 15.7 mag |
| Angular expansion | 0.8 ′ × 0.6 ′ |
| Position angle | 45 ° |
| Surface brightness | 14.0 mag / arcmin² |
| Physical data | |
| Redshift | 0.041265 +/- 0.000087 |
| Radial velocity | 12371 +/- 26 km / s |
|
Stroke distance v rad / H 0 |
(562 ± 39) · 10 6 ly (172.2 ± 12.1) Mpc |
| history | |
| discovery | Lewis Swift |
| Discovery date | September 25, 1886 |
| Catalog names | |
| NGC 6456 • PGC 60729 • CGCG 322-004, 321-034 • 2MASX J17423174 + 6735320 • | |
NGC 6456 is a 14.7 likes bright elliptical galaxy from the Hubble type E3 in the constellation Dragon . It is estimated to be 562 million light years from the Milky Way and about 130,000 light years in diameter.
NGC 6456 is the brightest galaxy in an optical galaxy cluster made up of the six closely spaced galaxies NGC 6463 , NGC 6470 , NGC 6471 , NGC 6472 and NGC 6477 . A final clear identification based on Swift's observations is still pending.
The object was discovered by Lewis A. Swift on September 25, 1886 .