NGC 5903
| Galaxy NGC 5903 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Libra |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 15 h 18 m 36.5 s |
| declination | -24 ° 04 ′ 07 ″ |
| Appearance | |
| Morphological type | E2 |
| Brightness (visual) | 11.2 mag |
| Brightness (B-band) | 12.2 mag |
| Angular expansion | 2.7 ′ × 2.1 ′ |
| Position angle | 168 ° |
| Surface brightness | 13.0 mag / arcmin² |
| Physical data | |
| Affiliation | LGG 398 |
| Redshift | 0.008556 ± 0.000017 |
| Radial velocity | (2565 ± 5) km / s |
|
Stroke distance v rad / H 0 |
(112 ± 8) · 10 6 ly (34.4 ± 2.4) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | May 21, 1784 |
| Catalog names | |
| NGC 5903 • UGCA 405 • PGC 54646 • ESO 514-004 • MCG -04-36-008 • 2MASX J15183652-2404069 • SGC 151540-2353.2 • GC 4081 • H III 139 • h 3598 • GALEX ASC J151836.83-240407.3 • LDCE 1117 NED004 | |
NGC 5903 is an 11.2 mag bright elliptical galaxy of the Hubble type E2 in the constellation Libra on the ecliptic . It is estimated to be 112 million light years from the Milky Way and about 90,000 light years in diameter. Together with NGC 5898 , it probably forms a gravitationally bound galaxy pair. In the same area of the sky is u. a. the galaxy IC 4538 .
The object was discovered on May 21, 1784 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described it as "Two, nearly parallel 7 'distant, Both vF, not vS, R." When making two observations with an 18-inch reflector telescope, John Herschel noted “B, R, pgbM, 20 arcseconds” and “pF, R, gpmbM, 30 arcseconds” in 1847.
NGC 5903 group ( LGG 398 )
| Galaxy | Alternative name | Distance / million Lj |
|---|---|---|
| NGC 5903 | PGC 54646 | 112 |
| NGC 5898 | PGC 54625 | 92 |
| IC 4538 | PGC 54776 | 125 |
| PGC 54644 | ESO 514-003 | 102 |
| PGC 55081 | ESO 582-012 | 102 |