NGC 7723
| Galaxy NGC 7723 |
|
|---|---|
|
|
| Image taken with the 81 cm reflecting telescope of the Mount Lemmon Observatory | |
| AladinLite | |
| Constellation | Aquarius |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 23 h 38 m 57.08 s |
| declination | -12 ° 57 ′ 39.9 ″ |
| Appearance | |
| Morphological type | SB (r) b |
| Brightness (visual) | 11.2 mag |
| Brightness (B-band) | 12.0 mag |
| Angular expansion | 3.5 ′ × 2.3 ′ |
| Position angle | 40 ° |
| Surface brightness | 13.3 mag / arcmin² |
| Physical data | |
| Affiliation | NGC 7727 group LGG 480 |
| Redshift | 0.006254 ± 0.000027 |
| Radial velocity | 1875 ± 8 km / s |
|
Stroke distance v rad / H 0 |
(87 ± 6) · 10 6 ly (26.7 ± 1.9) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | November 27, 1785 |
| Catalog names | |
| NGC 7723 • PGC 72009 • MCG -02-60-005 • IRAS 23363-1314 • 2MASX J23385709-1257396 • GC 4998 • H I-110 • h 2261 • LDCE 1589 NED001 • NVSS J233856-125738 • WISEA J233857.05-125740.3 | |
NGC 7723 is a barred spiral galaxy of the Hubble type SBb in the constellation Aquarius on the ecliptic . It is estimated to be 87 million light years from the Milky Way and about 90,000 light years across. Together with four other galaxies, nsie is considered a member of the NGC 7727 group ( LGG 480 ).
The Type Ia supernova SN 1975N was observed here.
The object was discovered by William Herschel on November 27, 1785 .
literature
- Chevalier, RA; Furenlid, I .: "The dynamics of barred spiral galaxies. I - The SBb galaxy NGC 7723"; Astrophysical Journal 225, pp. 67-78 (1978)
- del Río, MS; Cepa, J .: "The nature of arms in spiral galaxies. III. Azimuthal profiles."; Astronomy and Astrophysics 340, pp. 1-20 (1998)
- Aguerri et al .: "Characterizing bar structures: application to NGC 1300, NGC 7479 and NGC 7723"; Astronomy and Astrophysics 361, pp. 841-849 (2000)