NGC 3978
| Galaxy NGC 3978 |
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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 56 m 10.3 s |
| declination | + 60 ° 31 ′ 21 ″ |
| Appearance | |
| Morphological type | SABbc: / HII |
| Brightness (visual) | 12.4 mag |
| Brightness (B-band) | 13.2 mag |
| Angular expansion | 1.7 ′ × 1.5 ′ |
| Position angle | 27 ° |
| Surface brightness | 13.3 mag / arcmin² |
| Physical data | |
| Redshift | 0.033283 +/- 0.000110 |
| Radial velocity | 9978 +/- 3 km / s |
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Stroke distance v rad / H 0 |
(450 ± 32) · 10 6 ly (138.0 ± 9.7) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | March 19, 1790 |
| Catalog names | |
| NGC 3978 • UGC 6910 • PGC 37502 • CGCG 292-047 • MCG + 10-17-105 • IRAS 11535 + 6047 • 2MASX J11561045 + 6031300 • GC 2627 • H II 840 • h 1023 • HOLM 306A | |
NGC 3978 is a barred spiral galaxy of the Hubble type SBbc in the constellation Great Bear in the northern sky . It is estimated to be 450 million light years from the Milky Way .
The object was discovered on March 19, 1790 by the German-British astronomer Wilhelm Herschel .