NGC 7469

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Galaxy
NGC 7469
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Hubble Interacting Galaxy NGC 7469 (2008-04-24) .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
equinoxJ2000.0 , 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

  1. ^ Aladin Lite
  2. a b c d NASA / IPAC EXTRAGALACTIC DATABASE
  3. a b c d e f SEDS : NGC 7469
  4. ^ 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)
  5. Simbad
  6. Seligman