NGC 4974
| Galaxy NGC 4974 |
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|---|---|
![NGC 4974 with SDSS J130617.12 + 533540.5 (lu) [1] SDSS image](https://de.wikipedia.org/wiki/Datei:NGC4974_-_SDSS_DR14.jpg)
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| NGC 4974 with SDSS J130617.12 + 533540.5 (lu) SDSS image | |
| AladinLite | |
| Constellation | Big Bear |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 13 h 05 m 55.893 s |
| declination | + 53 ° 39 ′ 33.37 ″ |
| Appearance | |
| Morphological type | S0 |
| Brightness (visual) | 13.3 mag |
| Brightness (B-band) | 14.3 mag |
| Angular expansion | 1.4 ′ × 1.2 ′ |
| Position angle | 129 ° |
| Surface brightness | 13.7 mag / arcmin² |
| Physical data | |
| Affiliation | WBL 430 |
| Redshift | 0.029437 ± 0.000037 |
| Radial velocity | 8825 ± 11 km / s |
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Stroke distance v rad / H 0 |
(399 ± 28) · 10 6 ly (122.2 ± 8.6) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | April 14, 1789 |
| Catalog names | |
| NGC 4974 • PGC 45334 • CGCG 270-051 • CGCG 271-007 • MCG + 09-22-011 • IRAS 13039 + 5352 • 2MASX J13055593 + 5339331 • GC 3411 • H III 782 • GALEX ASC J130555.88 + 533932.2 • LDCE 942 NED003 • NSA 162977 • WISEA J130555.90 + 533933.4 | |
NGC 4974 is a 13.3 mag bright lens-shaped galaxy of the Hubble-type S0 with pronounced emission lines in the constellation Great Bear in the northern sky . It is estimated to be 399 million light years from the Milky Way and about 165,000 light years in diameter .
Together with NGC 4967 and NGC 4973 , they were discovered as the brightest members of a small group of six or seven galaxies in a single observation on April 14, 1789 by Wilhelm Herschel with an 18.7-inch reflector telescope, the “Two nebulae [NGC 4973 & NGC 4974] Both vF, S. Place is that of second, the other is 3 'or 4' Sp "noted.