NGC 3155
| Galaxy NGC 3155 / NGC 3194 |
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|---|---|
![NGC 3155 [1]](https://de.wikipedia.org/wiki/Datei:NGC_3194_DSS.jpg)
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| NGC 3155 | |
| AladinLite | |
| Constellation | Dragon |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 10 h 17 m 39.85 s |
| declination | + 74 ° 20 ′ 50.6 ″ |
| Appearance | |
| Morphological type | S? |
| Brightness (visual) | 12.9 mag |
| Brightness (B-band) | 13.8 mag |
| Angular expansion | 1.0 '× 0.5' |
| Position angle | 41 ° |
| Surface brightness | 12.0 mag / arcmin² |
| Physical data | |
| Affiliation | NGC 3147 group LGG 193 |
| Redshift | 0.009820 ± 0.000010 |
| Radial velocity | 2944 ± 3 km / s |
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Stroke distance v rad / H 0 |
(137 ± 9) · 10 6 ly (42.1 ± 2.9) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | April 2, 1801 |
| Catalog names | |
| NGC 3155 • NGC 3194 • UGC 5538 • PGC 30064 • CGCG 351-012 • MCG + 12-10-026 • IRAS 10133 + 7436 • 2MASX J10173987 + 7420504 • GC 2033 • H III 965 • h 676 • GALEX ASC J101739.79 +742052.6 • LDCE 719 NED002 | |
NGC 3155 = NGC 3194 is a galaxy in the constellation Dragon in the northern sky . It is estimated to be 137 million light years from the Milky Way and about 40,000 light years across. It is a member of the NGC 3147 group of four galaxies ( LGG 193 ).
In the same area of the sky are u. a. the galaxies NGC 3144 and NGC 3147 .
The object was discovered on April 2, 1801 by the German-British astronomer Wilhelm Herschel , which later led to the entry NGC 3194 . Since Wilhelm Herschel's position information for this observation night was affected by major systematic errors, the object was recorded by John Herschel as a new object on September 2, 1828 and later led to the entry NGC 3155 .