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 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.
NGC 3447A, also known as UGC 6007, is an irregular galaxy in contact with NGC 3447. [1] [4] It has roughly the same apparent magnitude, and has a slightly lower surface brightness. [1] Due to gravitational forces, it has become distorted, showing disrupted spiral arms and remnants of its spiral structure, hinting it might be a spiral galaxy in the past. [5]
The supernova SN 2012ht was discovered in NGC 3447 by Koichi Nishiyama and Fujio Kabashima on December 18, 2012. This supernova was of type Ia. [6] [7]
NGC 3447 is the largest galaxy in a group of galaxies named after it. The NGC 3447 group includes at least 4 other galaxies: NGC 3447A, NGC 3457, UGC 6022 and UGC 6035. [8]
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 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.
NGC 3447A, also known as UGC 6007, is an irregular galaxy in contact with NGC 3447. [1] [4] It has roughly the same apparent magnitude, and has a slightly lower surface brightness. [1] Due to gravitational forces, it has become distorted, showing disrupted spiral arms and remnants of its spiral structure, hinting it might be a spiral galaxy in the past. [5]
The supernova SN 2012ht was discovered in NGC 3447 by Koichi Nishiyama and Fujio Kabashima on December 18, 2012. This supernova was of type Ia. [6] [7]
NGC 3447 is the largest galaxy in a group of galaxies named after it. The NGC 3447 group includes at least 4 other galaxies: NGC 3447A, NGC 3457, UGC 6022 and UGC 6035. [8]