NGC 7727
| Galaxy NGC 7727 |
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|---|---|
|
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| Photo from the Hubble Space Telescope | |
| AladinLite | |
| Constellation | Aquarius |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 23 h 39 m 53.723 s |
| declination | -12 ° 17 ′ 34.01 ″ |
| Appearance | |
| Morphological type | SAB (s) a / pec |
| Brightness (visual) | 10.6 mag |
| Brightness (B-band) | 11.6 mag |
| Angular expansion | 4.7 ′ × 3.5 ′ |
| Position angle | 39 ° |
| Surface brightness | 13.5 mag / arcmin² |
| Physical data | |
| Affiliation | NGC 7727 group LGG 480 VizieR |
| Redshift | 0.006231 ± 0.000007 |
| Radial velocity | 1868 ± 2 km / s |
|
Stroke distance v rad / H 0 |
(87 ± 6) · 10 6 ly (26.7 ± 1.9) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | November 27, 1785 |
| Catalog names | |
| NGC 7727 • PGC 72060 • MCG -02-60-08 • IRAS 23367 + 2651 • 2MASX J23395386-1217348 • Arp 222 • VV 67 • GC 5000 • H I 111 • h 2262 • LDCE 1589 NED003 | |
NGC 7727 = Arp 222 is a bar-spiral galaxy of the Hubble type SBa in the constellation Aquarius on the ecliptic . It is estimated to be 87 million light years away from the Milky Way and about 115,000 light years in diameter. Together with NGC 7724 , it forms a gravitationally bound galaxy pair and is the brightest galaxy of the NGC 7727 group ( LGG 480 ).
Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This galaxy belongs to the class of galaxies with amorphous spiral arms .
In the same area of the sky is u. a. the galaxy NGC 7723 .
The object was discovered on November 27, 1785 by the German-British astronomer Wilhelm Herschel .
NGC 7727 group ( LGG 480 )
| Galaxy | Alternative name | Distance / million ly |
|---|---|---|
| NGC 7723 | PGC 72009 | 87 |
| NGC 7724 | PGC 72015 | 90 |
| NGC 7727 | PGC 72060 | 87 |
| PGC 72057 | MCG-02-60-007 | 292! |
| PGC 72097 | MCG-02-60-010 | 90 |
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