NGC 5540
| Galaxy NGC 5540 |
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|---|---|
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| SDSS recording | |
| AladinLite | |
| Constellation | Big Bear |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 14 h 14 m 54.4 s |
| declination | + 60 ° 00 ′ 40 ″ |
| Appearance | |
| Morphological type | E0 |
| Brightness (visual) | 13.9 likes |
| Brightness (B-band) | 14.9 mag |
| Angular expansion | 0.8 ′ × 0.6 ′ |
| Position angle | 36 ° |
| Surface brightness | 13.2 mag / arcmin² |
| Physical data | |
| Redshift | 0.036632 +/- 0.000073 |
| Radial velocity | 10982 +/- 22 km / s |
|
Stroke distance v rad / H 0 |
(497 ± 35) · 10 6 ly (152.3 ± 10.7) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | April 17, 1789 |
| Catalog names | |
| NGC 5540 • PGC 50883 • CGCG 295-041 • MCG + 10-20-90 • GC 3829 • H III 805 • | |
NGC 5540 is a 13.9 mag bright elliptical galaxy of the Hubble type E-S0 in the constellation Great Bear and about 497 million light years from Earth.
It was discovered on April 17, 1789 by Wilhelm Herschel with an 18.7-inch reflecting telescope, who described it as "eF, vS, R, stellar".