| NGC 3447 | |
|---|---|
 NGC 3447 (center-right), as seen by the Hubble Space Telescope. UGC 6007 can be seen on the left. | |
| Observation data (J2000 epoch) | |
| Constellation | Leo |
| Right ascension | 10h 53m 24s |
| Declination | +16° 46’ 20” |
| Redshift | 0.003559 |
| Distance | 70 Mly (21.4 Mpc) |
| Apparent magnitude (B) | 14.3 |
| Surface brightness | 25.37 mag/arcsec^2 (3447) and 24.38 mag/arcsec^2 (3447A) |
| Characteristics | |
| Type | SAm (3447) and Im (3447A) |
| Other designations | |
| PGC 32694/32700, UGC 6006/6007, VV 252, IRAS 10507+1702, CGCG 095-058, KPG 255 | |
NGC 3447 is a barred Magellanic spiral galaxy located in the constellation Leo. Its speed relative to the cosmic microwave background is 1,405 ± 34 km/s, which corresponds to a Hubble distance of 20.7 ± 1.5 Mpc (∼67.5 million ly).[1] It was discovered by the British astronomer John Herschel in 1836.
NGC 3447 shows a broad HI line.[1]
With a surface brightness equal to 15.61 mag/am^2, NGC 3443 is classified as a low surface brightness galaxy (LSB). LSB galaxies are diffuse galaxies with a surface brightness less than one magnitude lower than that of the ambient night sky.[2]
To date, four non-redshift measurements yield a distance of 13.730 ± 9.802 Mpc (∼44.8 million ly),[3] which is slightly outside the range values of Hubble.
- ^ a b "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-07-21.
- ^ "Revised data from NGC/IC Catalogue by Wolfgang Steinckle from NGC 3400 to 3499". astrovalleyfield.ca. Retrieved 2024-07-21.
- ^ "NED Query Results for NGC 3447". ned.ipac.caltech.edu. Retrieved 2024-07-21.