NGC 7558
| Galaxy NGC 7558 |
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|---|---|
![SDSS image from NGC 7558 [1]](https://de.wikipedia.org/wiki/Datei:NGC7558_-_SDSS_DR14.jpg)
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| SDSS image from NGC 7558 | |
| AladinLite | |
| Constellation | Pegasus |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 23 h 15 m 38.2 s |
| declination | + 18 ° 55 ′ 11 ″ |
| Appearance | |
| Morphological type | E? / Sat |
| Brightness (visual) | 14.9 mag |
| Brightness (B-band) | 15.9 mag |
| Angular expansion | 0.4 '× 0.4' |
| Surface brightness | 12.9 mag / arcmin² |
| Physical data | |
| Affiliation | HCG 93 |
| Redshift | 0.029624 ± 0.000130 |
| Radial velocity | (8881 ± 39) km / s |
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Stroke distance v rad / H 0 |
(405 ± 28) · 10 6 Lj (124.1 ± 8.7) Mpc |
| history | |
| discovery | Albert Marth |
| Discovery date | November 3, 1864 |
| Catalog names | |
| NGC 7558 • PGC 70844 • MCG + 03-59-016 • 2MASX J23153820 + 1855111 • HCG 93E • GALEX ASC J231538.27 + 185512.3 • NSA 150918 | |
NGC 7558 is an elliptical galaxy of Hubble type E / S0 in the constellation Pegasus north of the ecliptic . It is estimated to be 405 million light years from the Milky Way and about 45,000 light years in diameter .
Together with NGC 7547 , NGC 7549 and NGC 7550 , it forms the galaxy group HCG 93 .
The object was discovered by Albert Marth on November 3, 1864 .