NGC 691
| Galaxy NGC 691 |
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|---|---|
|
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| NGC 691 imaged using the Hubble Space Telescope | |
| AladinLite | |
| Constellation | Aries |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 01 h 50 m 41.72 s |
| declination | + 2145 ° 35.7 ′ |
| Appearance | |
| Morphological type | SA (rs) bc |
| Brightness (visual) | 11.5 likes |
| Brightness (B-band) | 12.3 mag |
| Angular expansion | 3.5 ′ × 2.6 ′ |
| Position angle | 95 ° |
| Surface brightness | 13.7 mag / arcmin² |
| Physical data | |
| Affiliation | NGC 691 group LGG 34 |
| Redshift | 0.008889 ± 0.000013 |
| Radial velocity | 2665 ± 4 km / s |
|
Stroke distance v rad / H 0 |
(124 ± 9) · 10 6 ly (37.9 ± 2.7) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | November 13, 1786 |
| Catalog names | |
| NGC 691 • UGC 1305 • PGC 6793 • CGCG 482-023 • CGCG 460-031 • MCG + 04-05-019 • IRAS 01479 + 2130 • GC 410 • H II-617 • WISEA J015041.71 + 214536.1 • LDCE 109 NED004 | |
NGC 691 is a spiral galaxy of Hubble type Sbc in the constellation Aries on the ecliptic . It is estimated to be 124 million light years from the Milky Way and about 120,000 light years in diameter . It is the brightest member of the ten galaxies in the NGC 691 group ( LGG 34 ). In the same area of the sky are u. a. the galaxies NGC 680 , NGC 694 , IC 167 , IC 1730 .
The Type Ia supernova SN 2005W was observed here.
The object was discovered by Wilhelm Herschel on November 13, 1786 .
NGC 691 group ( LGG 34 )
| Galaxy | Alternative name | Distance / million Lj |
|---|---|---|
| NGC 678 | PGC 6690 | 131 |
| NGC 680 | PGC 6719 | 136 |
| NGC 691 | PGC 6793 | 124 |
| NGC 694 | PGC 6816 | 136 |
| NGC 697 | PGC 6848 | 143 |
| IC 163 | PGC 6675 | 128 |
| IC 167 | PGC 6833 | 136 |
| PGC 6716 | UGC 1287 | 132 |
| PGC 6750 | UGC 1294 | 132 |
| PGC 7613 | UGC 1490 | 142 |
gallery
NGC 691 imaged with the Liverpool Telescope
Excerpt from LGG 34, SDSS
