NGC 4909
| Galaxy NGC 4909 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | centaur |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 13 h 02 m 01.8 s |
| declination | -42 ° 46 ′ 17 ″ |
| Appearance | |
| Morphological type | (R_1R'_2) SAB (l) a |
| Brightness (visual) | 12.7 mag |
| Brightness (B-band) | 13.6 mag |
| Angular expansion | 1.9 ′ × 1.7 ′ |
| Position angle | 28 ° |
| Surface brightness | 13.8 mag / arcmin² |
| Physical data | |
| Redshift | 0.011216 +/- 0.000029 |
| Radial velocity | 3362 +/- 9 km / s |
|
Stroke distance v rad / H 0 |
(143 ± 10) · 10 6 ly (43.7 ± 3.1) Mpc |
| history | |
| discovery | John Herschel |
| Discovery date | June 5, 1834 |
| Catalog names | |
| NGC 4909 • PGC 44949 • ESO 269-35 • MCG -07-27-028 • 2MASX J13020184-4246169 • SGC 125912-4230.2 • GC 3362 • h 3452 • LDCE 0916 NED133 | |
NGC 4909 is an annular spiral galaxy of the Hubble type Sa in the constellation Centaur in the southern sky . It is estimated to be 143 million light years from the Milky Way and about 85,000 ly in diameter.
The object was discovered on June 5, 1834 by John Herschel with an 18-inch reflector telescope, who described it as "eF, precedes 3 or 4 stars, 11..12th mag."