NGC 7549
| Galaxy NGC 7549 |
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|---|---|
![NGC 7549 [1] SDSS image](https://de.wikipedia.org/wiki/Datei:NGC7549_-_SDSS_DR14.jpg)
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| NGC 7549 SDSS image | |
| AladinLite | |
| Constellation | Pegasus |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 23 h 15 m 17.2 s |
| declination | + 19 ° 02 ′ 30 ″ |
| Appearance | |
| Morphological type | SB (s) cd pec / AGN |
| Brightness (visual) | 13.2 mag |
| Brightness (B-band) | 13.9 likes |
| Angular expansion | 2.8 'x 0.7' |
| Position angle | 8 ° |
| Surface brightness | 13.8 mag / arcmin² |
| Physical data | |
| Affiliation | WBL 700 HCG 93 |
| Redshift | 0.015799 ± 0.000011 |
| Radial velocity | (4736 ± 3) km / s |
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Stroke distance v rad / H 0 |
(220 ± 15) · 10 6 ly (67.3 ± 4.7) Mpc |
| history | |
| discovery | Bindon B. Stoney |
| Discovery date | November 2, 1850 |
| Catalog names | |
| NGC 7549 • UGC 12457 • PGC 70832 • CGCG 454-013 • MCG + 03-59-014 • 2MASX J23151728 + 1902299 • Arp 99 • HCG 93B • NVSS J231516 + 190227 • LDCE 1563 NED004 • KTG 78C | |
NGC 7549 is a barred spiral galaxy with an active galactic nucleus from Hubble type SBc in the constellation Pegasus asm northern sky . It is an estimated 220 million light years away from the Milky Way and about 170,000 light years in diameter. Together with NGC 7550 it forms the galaxy pair Arp 99 and together with NGC 7547 , NGC 7553 and NGC 7558 the galaxy group HCG 93 .
Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This galaxy belongs to the class spiral galaxies with an elliptical companion on one arm (Arp catalog) .
The type Ia supernova SN 2009nq and the type II supernova candidate NAME AT 2019fya were observed here.
The object was discovered by Bindon Blood Stoney on November 2, 1850 .
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