NGC 2655
| Galaxy NGC 2655 |
|
|---|---|
|
|
| Photo from the Hubble Space Telescope | |
| AladinLite | |
| Constellation | giraffe |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 08 h 55 m 37.7 s |
| declination | + 78 ° 13 ′ 23 ″ |
| Appearance | |
| Morphological type | SAB (s) 0 / a / Sy2 / LINER |
| Brightness (visual) | 10.1 mag |
| Brightness (B-band) | 11.0 mag |
| Angular expansion | 4.9 ′ × 4.1 ′ |
| Position angle | 85 ° |
| Surface brightness | 13.2 mag / arcmin² |
| Physical data | |
| Affiliation | LGG 165 |
| Redshift | 0.004670 ± 0.000003 |
| Radial velocity | (1400 ± 1) km / s |
|
Stroke distance v rad / H 0 |
(69 ± 5) · 10 6 ly (21.1 ± 1.5) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | September 26, 1802 |
| Catalog names | |
| NGC 2655 • UGC 4637 • PGC 25069 • CGCG 349-033 • CGCG 350-007 • MCG + 13-07-010 • IRAS 08491 + 7824 • 2MASX J08553773 + 7813230 • Arp 225 • GC 1691 • H I 288 • h 520 • LDCE 602 NED002 | |
NGC 2655 = Arp 225 is a lenticular galaxy of the Hubble type SB0 / a in the constellation Giraffe in the northern sky . It is an estimated 69 million light years away from the Milky Way and has a diameter of about 95,000 ly. Together with NGC 2591 , NGC 2715 , NGC 2748 and three other galaxies, it forms the NGC-2655 group .
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 .
The Type Ia supernova SN 2011B was observed here.
The object was discovered on September 26, 1802 by the German-British astronomer William Herschel .
NGC 2655 group ( LGG 165 )
| Galaxy | Alternative name | Distance / million Lj |
|---|---|---|
| NGC 2655 | PGC 25069 | 69 |
| NGC 2591 | PGC 24231 | 65 |
| NGC 2715 | PGC 25676 | 66 |
| NGC 2748 | PGC 26018 | 72 |
| PGC 24200 | UGC 4466 | 70 |
| PGC 25427 | UGC 4714 | 62 |
| PGC 25371 | UGC 4701 | 69 |
Web links
- SIMBAD Astronomical Database
- astronews.com: Picture of the day April 24, 2018
- Spektrum .de: amateur recordings [1]
- Arp Atlas of Peculiar Galaxies
- Seligman Arp
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