NGC 684
| Galaxy NGC 684 / IC 165 |
|
|---|---|
|
|
| SDSS recording | |
| AladinLite | |
| Constellation | triangle |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 01 h 50 m 14.0 s |
| declination | + 27 ° 38 ′ 44 ″ |
| Appearance | |
| Morphological type | Sb |
| Brightness (visual) | 12.5 mag |
| Brightness (B-band) | 13.3 mag |
| Angular expansion | 1.2 ′ × 0.6 ′ |
| Position angle | 87 ° |
| Surface brightness | 12.0 mag / arcmin² |
| Physical data | |
| Affiliation | LGG 32 |
| Redshift | 0.011791 ± 0.000005 |
| Radial velocity | 3535 ± 1 km / s |
|
Stroke distance v rad / H 0 |
(163 ± 11) · 10 6 ly (50 ± 3.5) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | October 26, 1786 |
| Catalog names | |
| NGC 684 • IC 165 • UGC 1292 • PGC 6759 • CGCG 482-022 • MCG + 04-05-017 • IRAS 01474 + 2724 • 2MASX J01501400 + 2738444 • GC 403 • H II-612 • h 152 • LDCE 106 NED003 | |
NGC 684 = IC 165 is an edge-on spiral galaxy of the Hubble-type Sb in the constellation Triangle in the northern sky , approximately half a degree northeast of the interacting galaxies NGC 672 and IC 1727 . It is an estimated 163 million light years from the Milky Way and about 150,000 light years across.
In the same area of the sky are u. a. the galaxies NGC 670 , NGC 672 , IC 1727 , IC 1731 .
The object was discovered by William Herschel on October 26, 1786 .
NGC 684 group ( LGG 32 )
| Galaxy | Alternative name | Distance / million Lj |
|---|---|---|
| NGC 684 | PGC 6759 | 163 |
| NGC 670 | PGC 6570 | 171 |
| IC 1731 | PGC 6756 | 162 |
Web links
Commons : NGC 684 - collection of images, videos, and audio files
