NGC 6474
| Galaxy NGC 6474 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Dragon |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 17 h 47 m 05.558 s |
| declination | + 57 ° 18 ′ 04.24 ″ |
| Appearance | |
| Morphological type | Sbc |
| Brightness (visual) | 14.2 mag |
| Brightness (B-band) | 15.0 mag |
| Angular expansion | 0.9 ′ × 0.5 ′ |
| Position angle | 75 ° |
| Surface brightness | 13.2 mag / arcmin² |
| Physical data | |
| Redshift | 0.028246 ± 0.000163 |
| Radial velocity | (8468 ± 49) km / s |
|
Stroke distance v rad / H 0 |
(387 ± 27) · 10 6 ly (118.8 ± 8.3) Mpc |
| diameter | 120,000 ly |
| history | |
| discovery | Lewis Swift |
| Discovery date | July 22, 1886 |
| Catalog names | |
| NGC 6474 • UGC 10989 • PGC 60850 • CGCG 300-068 • MCG + 10-25-092 • IRAS 17462 + 5718 • 2MASX J17470549 + 5718036 • | |
NGC 6474 is a 14.2 likes bright spiral galaxy of Hubble type Sbc in the constellation Dragon at the northern sky . It is about 387 million light years from the Milky Way and about 120,000 light years in diameter.
The object was discovered by Lewis A. Swift on July 22, 1886 . Swift's notes from the night of July 22, 1886 ("eeF, S, R, s of 2" for NGC 6473 , "eF, pS, R; 3 sts in a line near and 3 others in a line point to it; e diff; n of 2 "for NGC 6474 ) refer to two different objects and are also too different to describe the same galaxy despite almost identical position information. The acceptance of some modern catalogs that refer to NGC 6474 as NGC 6473 is therefore to be rejected.
Web links
- NGC 6473. SIMBAD, accessed August 4, 2016 .
- NGC 6474. DSO Browser, accessed August 4, 2016 .
- Auke Slotegraaf: NGC 6474. Deep Sky Observer's Companion, accessed on August 4, 2016 .