NGC 7469
| Galaxy NGC 7469 |
|
|---|---|
.jpg)
|
|
| Hubble image of NGC 7469 (upper right half of the image); left of center: IC 5283 . (North is below in this picture.) | |
| AladinLite | |
| Constellation | Pegasus |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 23 h 03 m 15.6 s |
| declination | + 08 ° 52 ′ 26 ″ |
| Appearance | |
| Morphological type | SBa |
| Brightness (visual) | 12.0 mag |
| Brightness (B-band) | 12.9 mag |
| Angular expansion | 1.4 ′ × 1 ′ |
| Position angle | 125 ° |
| Surface brightness | 12.2 mag / arcmin² |
| Physical data | |
| Affiliation | isolated |
| Redshift | 0.016317 ± 0.000007 |
| Radial velocity | (4892 ± 2) km / s |
|
Stroke distance v rad / H 0 |
(226 ± 16) x 10 6 ly (69.2 ± 4.8) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | November 12, 1784 |
| Catalog names | |
| NGC 7469 • UGC 12332 • PGC 70348 • CGCG 405-026 • MCG + 01-58-025 • IRAS 23007 + 0836 • Arp 298 • Mrk 1514 • GC 4888 • H III 230 • h 2204 • NVSS J230315 + 085226 • Holm 803A • KPG 575A | |
NGC 7469 is a bar-spiral galaxy with an active nucleus of the Hubble type SBa in the constellation Pegasus in the northern sky. It is estimated to be 226 million light years from the Milky Way and about 90,000 light years in diameter. The galaxy is one of the best studied Seyfert galaxies . The mass of the black hole in its center is around 10 7 solar masses.
From the Earth seen from about 80 "north of NGC 7469 is 5283 IC to find. The two galaxies form the isolated, interacting galaxy pair Arp 298 , KPG 575 or spar 803 .
Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This pair of galaxies belongs to the class Unclassified double galaxies .
The supernova SN 2000ft (Type II) and SN 2008ec ( Type Ia ) were observed here.
The object was discovered by Wilhelm Herschel on November 12, 1784 .
literature
- Jeff Kanipe and Dennis Webb: The Arp Atlas of Peculiar Galaxies - A Chronicle and Observer's Guide , Richmond 2006, ISBN 978-0-943396-76-7
Web links
Individual evidence
- ^ Aladin Lite
- ↑ a b c d NASA / IPAC EXTRAGALACTIC DATABASE
- ↑ a b c d e f SEDS : NGC 7469
- ^ Czerny et al .: "Black hole masses from power density spectra: determinations and consequences"; in: Monthly Notices of the Royal Astronomical Society, Vol. 325, Issue 2, pp. 865ff. bibcode : 2001MNRAS.325..865C (English)
- ↑ Simbad
- ↑ Seligman