NGC 2273
| Galaxy NGC 2273 |
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|---|---|
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| Image taken with the Hubble Space Telescope | |
| AladinLite | |
| Constellation | lynx |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 06 h 50 m 08.6 s |
| declination | + 60 ° 50 ′ 45 ″ |
| Appearance | |
| Morphological type | SB (r) a: Sy |
| Brightness (visual) | 11.7 mag |
| Brightness (B-band) | 12.6 mag |
| Angular expansion | 3.6 ′ × 2.0 ′ |
| Position angle | 50 ° |
| Surface brightness | 13.8 mag / arcmin² |
| Physical data | |
| Affiliation | NGC 2273 group LGG 137 |
| Redshift | 0.006138 ± 0.000013 |
| Radial velocity | 1840 ± 4 km / s |
|
Stroke distance v rad / H 0 |
(86 ± 6) · 10 6 ly (26.4 ± 1.8) Mpc |
| history | |
| discovery | Nils Christofer Dunér |
| Discovery date | September 15, 1867 |
| Catalog names | |
| NGC 2273 • UGC 3546 • PGC 19688 • CGCG 285-006 • MCG + 10-10-015 • IRAS 06456 + 6054 • 2MASX J06500866 + 6050445 • Mrk 620 • NVSS J065008 + 605044 • LDCE 472 NED002 | |
NGC 2273 is a bar-spiral galaxy with an active nucleus of the Hubble type SBbc in the constellation Lynx in the northern sky . It is estimated to be 86 million light-years from the Milky Way and about 90,000 light-years across. Together with PGC 19397 and PGC 19579 , it forms the small NGC 2273 group .
The object was discovered on September 15, 1867 by the astronomer Nils Christofer Dunér with a 24 cm telescope . Investigations with the Hubble Space Telescope and the WIYN Telescope show a spectacular shape:
"This is a rather spectacular four- ringed spiral galaxy, with two outer rings, an inner ring, and a bright star-forming nuclear ring with a luminous blue nuclear spiral inside. The latter structure masquerades as a secondary bar in ellipse fits and ground-based images. "
gallery
Image of the ultraviolet radiation from NGC 2273 using the GALEX space telescope .
NGC 2273 group ( LGG 137 )
| Galaxy | Alternative name | Distance / million Lj |
|---|---|---|
| NGC 2273 | PGC 19688 | 86 |
| PGC 19579 | NGC 2273B | 97 |
| PGC 19397 | UGC 3504 | 97 |
Web links
- SIMBAD Astronomical Database
- Peter Erwin, Linda S. Sparke: Double bars, inner disks, and nuclear rings in early-type disk galaxies. bibcode : 2002AJ .... 124 ... 65E