NGC 3447
| Galaxy NGC 3447 |
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|---|---|
![NGC 3447 with LEDA 32700 (ul) [1] (images from the Hubble space telescope)](https://upload.wikimedia.org/wikipedia/commons/thumb/a/ad/NGC_3447_-_HST_-_Potw1712a.tif/lossy-page1-300px-NGC_3447_-_HST_-_Potw1712a.tif.jpg)
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| NGC 3447 with LEDA 32700 (ul) (images from the Hubble space telescope ) | |
| AladinLite | |
| Constellation | lion |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 10 h 53 m 24.0 s |
| declination | + 16 ° 46 ′ 21 ″ |
| Appearance | |
| Morphological type | SAB (s) m pec |
| Brightness (visual) | 13.3 mag |
| Brightness (B-band) | 13.9 likes |
| Angular expansion | 3.8 ′ × 2.2 ′ |
| Position angle | 0 ° |
| Surface brightness | 15.5 mag / arcmin² |
| Physical data | |
| Affiliation | LGG 225 |
| Redshift | 0.003556 ± 0.000003 |
| Radial velocity | 1066 ± 1 km / s |
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Stroke distance v rad / H 0 |
(44 ± 3) x 10 6 ly (13.5 ± 0.9) Mpc |
| history | |
| discovery | John Herschel |
| Discovery date | March 18, 1836 |
| Catalog names | |
| NGC 3447 • UGC 6006 • PGC 32694 • CGCG 095-058 • MCG + 03-28-27 • IRAS 10507 + 1702 • VV 252 • KCPG 255A | |
NGC 3447 is a barred spiral galaxy of the Hubble type SBdm / P in the constellation Leo on the ecliptic . It is an estimated 44 million light years from the Milky Way and about 55,000 light years in diameter. Together with PGC 32700 it forms a bound galaxy pair and together with NGC 3457 , PGC 32826 and PGC 32747 the NGC 3447 group ( LGG 225 ).
In the same area of the sky are u. a. the galaxies NGC 3443 , NGC 3454 , NGC 3455 , NGC 3457 .
The Type Ia supernova SN 2012ht was observed here.
The object was discovered on March 18, 1836 by the astronomer John Herschel using his 18.7-inch mirror telescope.
NGC 3447 group ( LGG 225 )
| Galaxy | Alternative name | Distance / million Lj |
|---|---|---|
| NGC 3445 | PGC 32694 | 44 |
| PGC 32700 | NGC 3445A | 45 |
| NGC 3457 | PGC 32787 | 48 |
| PGC 32826 | UGC 6035 | 44 |
| PGC 32747 | UGC 6022 | 48 |