NGC 690
| Galaxy NGC 690 |
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|---|---|
![NGC 690 [1] SDSS image](https://de.wikipedia.org/wiki/Datei:NGC690_-_SDSS_DR14.jpg)
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| NGC 690 SDSS image | |
| AladinLite | |
| Constellation | whale |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 01 h 47 m 48.08 s |
| declination | -16 ° 43 ′ 19.2 ″ |
| Appearance | |
| Morphological type | SAB (s) c: |
| Brightness (visual) | 14.5 mag |
| Brightness (B-band) | 15.2 mag |
| Angular expansion | 1.2 ′ × 0.8 ′ |
| Position angle | 145 ° |
| Surface brightness | 14.3 mag / arcmin² |
| Physical data | |
| Redshift | 0.017212 ± 0.000033 |
| Radial velocity | 5160 ± 10 km / s |
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Stroke distance v rad / H 0 |
(230 ± 16) x 10 6 ly (70.6 ± 4.9) Mpc |
| history | |
| discovery | Francis P. Leavenworth |
| Discovery date | November 9, 1885 |
| Catalog names | |
| NGC 690 • PGC 6587 • MCG -03-05-021 • 2MASX J01474807-1643198 • SGC 014524-1658.2 • 2MASS J01474804-1643193 • WISEA J014748.11-164317.3 • | |
NGC 690 is a barred spiral galaxy of the Hubble type SBc in the constellation Whale south of the ecliptic . It is estimated to be 230 million light years from the Milky Way and about 80,000 light years in diameter .
The object was discovered on November 9, 1885 by the American astronomer Francis Preserved Leavenworth .
Web links
- SIMBAD Astronomical Database
- Auke Slotegraaf : NGC 690. Deep Sky Observer's Companion, accessed September 19, 2015 .