NGC 7257
| Galaxy NGC 7257 / NGC 7260 |
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|---|---|
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| SDSS recording | |
| AladinLite | |
| Constellation | Aquarius |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 22 h 22 m 36.4 s |
| declination | -04 ° 07 ′ 15 ″ |
| Appearance | |
| Morphological type | SAB (rs) bc / HII |
| Brightness (visual) | 12.9 mag |
| Brightness (B-band) | 13.7 mag |
| Angular expansion | 1.9 ′ × 1.4 ′ |
| Position angle | 33 ° |
| Surface brightness | 13.8 mag / arcmin² |
| Physical data | |
| Redshift | 0.016348 ± 0.000027 |
| Radial velocity | (4901 ± 8) km / s |
|
Stroke distance v rad / H 0 |
(225 ± 16) x 10 6 ly (68.9 ± 4.8) Mpc |
| history | |
| discovery | Albert Marth |
| Discovery date | October 1, 1864 |
| Catalog names | |
| NGC 7260 • 7257 • PGC 68691 • MCG -01-57-003 • IRAS F22199-0422 • 2MASX J22223645-0407146 • GC 6039 • 6040 • NSA 149765 • LDCE 1519 NED001 | |
NGC 7257 = NGC 7260 is a bar-spiral galaxy with extensive star formation regions of the Hubble type SBbc in the constellation Aquarius on the ecliptic . It is an estimated 225 million light years away from the Milky Way and about 125,000 light years in diameter.
In the same area of the sky is u. a. the galaxy NGC 7266 .
The type II supernova SN 2001cl was observed here.
The object was discovered by Albert Marth on October 1, 1864 . The entry NGC 7257 also refers to this galaxy and was observed by Édouard Stephan on September 22, 1876.