NGC 688
| Galaxy NGC 688 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | triangle |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 01 h 50 m 44.2 s |
| declination | + 35 ° 17 ′ 04 ″ |
| Appearance | |
| Morphological type | (R ') SAB (rs) b / Sbrst |
| Brightness (visual) | 12.5 mag |
| Brightness (B-band) | 13.3 mag |
| Angular expansion | 2.4 ′ × 1.5 ′ |
| Position angle | 145 ° |
| Surface brightness | 13.7 mag / arcmin² |
| Physical data | |
| Affiliation | LGG 35 |
| Redshift | 0.013846 +/- 0.000009 |
| Radial velocity | 4151 +/- 3 km / s |
|
Stroke distance v rad / H 0 |
(191 ± 13) · 10 6 ly (58.7 ± 4.1) Mpc |
| history | |
| discovery | Heinrich Louis d'Arrest |
| Discovery date | September 16, 1865 |
| Catalog names | |
| NGC 688 • UGC 1302 • PGC 6799 • CGCG 522-020 • MCG + 06-05-015 • IRAS 01478 + 3502 • 2MASX J01504419 + 3517041 • Mrk 1009 • GC 5194 • KUG 0147 + 350 • LDCE 0115 NED009 | |
NGC 688 is a barred spiral galaxy with a high star formation rate of the Hubble type SBb in the constellation Triangle in the northern sky . It is estimated to be 191 million light years away from the Milky Way and has a diameter of around 130,000 ly.
In the same area of the sky are the galaxies NGC 669 , NGC 700 , NGC 679 , IC 1732 , among others .
The object was discovered on September 16, 1865 by the German-Danish astronomer Heinrich Louis d'Arrest .
Web links
- SIMBAD Astronomical Database
- Auke Slotegraaf: NGC 688. Deep Sky Observer's Companion, accessed on September 19, 2015 .