NGC 6555
| Galaxy NGC 6555 |
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|---|---|
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| AladinLite | |
| Constellation | Hercules |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 18 h 07 m 49.17 s |
| declination | + 17 ° 36 ′ 17.6 ″ |
| Appearance | |
| Morphological type | SAB (rs) c |
| Brightness (visual) | 12.3 mag |
| Brightness (B-band) | 13.0 likes |
| Angular expansion | 2.1 ′ × 1.7 ′ |
| Position angle | 110 ° |
| Surface brightness | 13.5 mag / arcmin² |
| Physical data | |
| Redshift | 0.007422 ± 0.000013 |
| Radial velocity | 2225 ± 4 km / s |
|
Stroke distance v rad / H 0 |
(107 ± 8) · 10 6 ly (32.7 ± 2.3) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | June 29, 1799 |
| Catalog names | |
| NGC 6555 • UGC 11121 • PGC 61432 • CGCG 113-022 • MCG + 03-46-015 • IRAS 18056 + 1735 • 2MASX J18074916 + 1736176 • GC 4383 • H II 902 • HIPASS J1807 + 17 • HOLM 774A | |
NGC 6555 is a 12.3 likes bright barred spiral galaxy of Hubble type SBc in the constellation Hercules at the northern sky . It is an estimated 107 million light years away from the Milky Way and about 60,000 light years in diameter.
The object was discovered on June 29, 1799 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described it as “F, pL, R, vgbM, 3.5 ′ diameter”.
Web links
- NGC 6555. SIMBAD , accessed September 15, 2019 .
- NGC 6555. DSO Browser, accessed September 15, 2016 .