NGC 4618
Galaxy NGC 4618 / IC 3667 |
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Image taken with the Hubble Space Telescope | |
AladinLite | |
Constellation | Hunting dogs |
Position equinox : J2000.0 , epoch : J2000.0 |
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Right ascension | 12 h 41 m 32.8 s |
declination | + 41 ° 09 ′ 03 ″ |
Appearance | |
Morphological type | SB (rs) m / HII |
Brightness (visual) | 10.6 mag |
Brightness (B-band) | 11.2 mag |
Angular expansion | 4.2 ′ × 3.4 ′ |
Position angle | 25 ° |
Surface brightness | 13.3 mag / arcmin² |
Physical data | |
Affiliation | Messier 106 group Virgo superclusters CVn II group LGG 290 |
Redshift | 0.001815 ± 0.000003 |
Radial velocity | (544 ± 1) km / s |
Stroke distance v rad / H 0 |
(26 ± 2) x 10 6 ly (8.12 ± 0.57) Mpc |
history | |
discovery | Wilhelm Herschel |
Discovery date | April 9, 1787 |
Catalog names | |
NGC 4618 • IC 3667 • UGC 7853 • PGC 42575 • CGCG 216-017 • MCG + 07-26-37 • KUG 1239 + 414 • Arp 23 • VV 73 • GC 3151 and 3152 • H I 178 and I 179 • h 1385 • KCPG 349A • spar 438A; • LDCE 867 NED122 |
NGC 4618 = IC 3667 = Arp 23 is a bar-spiral galaxy of the Hubble-type SBm in the constellation Hounds in the northern sky . It is estimated to be 26 million light years from the Milky Way and around 30,000 light years across. Together with NGC 4625 , it forms the interacting galaxy pair Holm 438 or KPG 349 . In the same area of the sky are u. a. the galaxies NGC 4655 , IC 3713 , IC 3723 , IC 3726 .
Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This galaxy belongs to the class of one -armed spiral galaxies (Arp catalog) .
IC 3668 and IC 3669 each describe H-II regions and large star associations in this galaxy, which the astronomer Max Wolf discovered on March 21, 1903 and which received an entry in the index catalog .
The galaxies NGC 4618 and NGC 4625 imaged by GALEX in ultraviolet light.
The object was discovered on April 9, 1787 by the German-British astronomer Wilhelm Herschel .
Web links
- SIMBAD Astronomical Database
- GALEX press release
- GALEX finds invisible spiral arms
- Astronews
- NOAO
- ARP ATLAS OF PECULIAR GALAXIES
- Seligman Arp