NGC 3975
| Galaxy NGC 3975 |
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|---|---|
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| SDSS recording | |
| AladinLite | |
| Constellation | Big Bear |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 11 h 55 m 53.7 s |
| declination | + 60 ° 31 ′ 46 ″ |
| Appearance | |
| Morphological type | SAb? |
| Brightness (visual) | 15.3 mag |
| Brightness (B-band) | 16.1 mag |
| Angular expansion | 0.7 ′ × 0.3 ′ |
| Position angle | 95 ° |
| Surface brightness | 13.5 mag / arcmin² |
| Physical data | |
| Redshift | 0.032934 +/- 0.000085 |
| Radial velocity | 9873 +/- 25 km / s |
|
Stroke distance v rad / H 0 |
(446 ± 31) · 10 6 ly (136.6 ± 9.6) Mpc |
| history | |
| discovery | Lawrence Parsons |
| Discovery date | February 21, 1874 |
| Catalog names | |
| NGC 3975 • PGC 37480 • MCG + 10-17-103 • 2MASX J11555367 + 6031461 • HOLM 306B | |
NGC 3975 is a spiral galaxy of Hubble type Sb in the constellation Ursa Major at the northern sky . It is an estimated 446 million light years from the Milky Way .
The object was discovered on February 21, 1874 by the astronomer Lawrence Parsons, 4th Earl of Rosse .