NGC 4727
| Galaxy NGC 4727 / NGC 4740 |
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|---|---|
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| AladinLite | |
| Constellation | Crow |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 12 h 50 m 57.2 s |
| declination | -14 ° 19 ′ 59 ″ |
| Appearance | |
| Morphological type | SAB (r) bc |
| Brightness (visual) | 11.9 likes |
| Brightness (B-band) | 12.7 mag |
| Angular expansion | 1.6 ′ × 1.2 ′ |
| Position angle | 130 ° |
| Surface brightness | 12.5 mag / arcmin² |
| Physical data | |
| Redshift | 0.025000 |
| Radial velocity | 7495 km / s |
|
Stroke distance v rad / H 0 |
(329 ± 23) x 10 6 ly (101.0 ± 7.1) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | February 8, 1785 |
| Catalog names | |
| NGC 4727 • 4740 • PGC 43499 • MCG -02-33-023 • IRAS 12483-1403 • 2MASX J12505723-1419588 • GC 3251 • H II 298 • h 1450 • GALEX ASC J125057.22-141957.1 • HOLM 470A | |
NGC 4727 = NGC 4740 is an 11.9 mag bright bar-spiral galaxy of the Hubble type SBbc in the constellation Raven in the southern sky . It is estimated to be 329 million light years from the Milky Way and about 155,000 ly in diameter. Together with NGC 4724 , it forms a double galaxy; it is the larger and stronger partner.
In the same area of the sky are u. a. the galaxies NGC 4726 , IC 3822 , IC 3824 , IC 3827 .
The supernovae SN 1965B and SN 2003eg (Type II) were observed here.
The object was discovered on February 8, 1785 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described it as “F, pL, lbM, 0.5 ′ preceding is a small suspected stellar”. A second "discovery" on April 27, 1887 by Lewis A. Swift and his description "pF, pS, R, mbM" led to the catalog entry under NGC 4740 .