NGC 5240
| Galaxy NGC 5240 |
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|---|---|
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| NGC 5240 with LEDA 4545805 (ro), SDSS | |
| AladinLite | |
| Constellation | Hunting dogs |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 13 h 35 m 55.2 s |
| declination | + 35 ° 35 ′ 18 ″ |
| Appearance | |
| Morphological type | SB (s) cd? / Seyfert 2 |
| Brightness (visual) | 13.1 mag |
| Brightness (B-band) | 13.8 mag |
| Angular expansion | 1.9 ′ × 1.4 ′ |
| Position angle | 60 ° |
| Surface brightness | 14.0 mag / arcmin² |
| Physical data | |
| Redshift | 0.007452 ± 0.000027 |
| Radial velocity | (2234 ± 8) km / s |
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Stroke distance v rad / H 0 |
(102 ± 7) · 10 6 ly (31.4 ± 2.2) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | May 1, 1785 |
| Catalog names | |
| NGC 5240 • UGC 8587 • PGC 47971 • CGCG 190-034 • MCG + 06-30-056 • IRAS F13336 + 3551 • 2MASX J13355522 + 3535177 • GC 3610 • H III 409 • GALEX ASC J133555.24 + 353518.9 | |
NGC 5240 is a 13.1 mag bright bar spiral galaxy of the Hubble type SBc in the constellation of the Hounds in the northern sky . It is estimated to be 102 million light-years away from the Milky Way and has a diameter of about 55,000 ly. a. the galaxies NGC 5223 , NGC 5228 , NGC 5233 .
The object was discovered on May 1, 1785 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described it as "vF, pL, R, lbM".