IC 561
| Galaxy IC 561 |
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|---|---|
![IC 561 with LEDA 1245918 [1] (lu)](https://de.wikipedia.org/wiki/Datei:IC561_-_SDSS_DR14.jpg)
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| IC 561 with LEDA 1245918 (lu) | |
| AladinLite | |
| Constellation | sextant |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 09 h 45 m 58.8 s |
| declination | + 03 ° 08 ′ 43 ″ |
| Appearance | |
| Morphological type | Sc |
| Brightness (visual) | 14.6 mag |
| Brightness (B-band) | 15.6 mag |
| Angular expansion | 0.40 ′ × 0.3 ′ |
| Position angle | 15 ° |
| Surface brightness | 12.1 mag / arcmin² |
| Physical data | |
| Affiliation | WBL 239 |
| Redshift | 0.019830 ± 0.000067 |
| Radial velocity | 5945 ± 20 km / s |
|
Stroke distance v rad / H 0 |
(259 ± 18) · 10 6 ly (79.5 ± 5.6) Mpc |
| history | |
| discovery | Stéphane Javelle |
| Discovery date | March 21, 1893 |
| Catalog names | |
| IC 561 • PGC 28002 • CGCG 035-049 N01 • MCG + 01-25-019 • 2MASX J09455879 + 0308429 • NSA 17007 • USGC U256 NED03 • HOLM 143C | |
IC 561 is a Hubble-type Sb spiral galaxy in the constellation Sextant south of the ecliptic . It is estimated to be 259 million light years from the Milky Way and about 25,000 light years across . Together with IC 563 and IC 564 , it forms the galaxy trio Holm 143 .
The object was discovered by Stéphane Javelle on March 21, 1893 .