NGC 3639
| Galaxy NGC 3639 |
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|---|---|
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| SDSS recording | |
| AladinLite | |
| Constellation | lion |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 11 h 21 m 35.7 s |
| declination | + 18 ° 27 ′ 31 ″ |
| Appearance | |
| Morphological type | S? |
| Brightness (visual) | 13.3 mag |
| Brightness (B-band) | 14.2 mag |
| Angular expansion | 0.6 ′ × 0.5 ′ |
| Position angle | 39 ° |
| Surface brightness | 11.8 mag / arcmin² |
| Physical data | |
| Affiliation | isolated |
| Redshift | 0.018149 ± 0.000020 |
| Radial velocity | 5441 ± 6 km / s |
|
Stroke distance v rad / H 0 |
(240 ± 17) x 10 6 ly (73.7 ± 5.2) Mpc |
| history | |
| discovery | RJ Mitchell |
| Discovery date | January 21, 1855 |
| Catalog names | |
| NGC 3639 • UGC 6374 • PGC 34819 • CGCG 096-032 • MCG + 03-29-036 • 2MASX J11213572 + 1827293 • GC 2385 • NVSS J112135 + 182729 • SIP 0981-1 • ARK 289 | |
NGC 3639 is a galaxy of Hubble type S? in the constellation Leo on the ecliptic . It is an estimated 240 million light years away from the Milky Way and about 40,000 light years in diameter.
The galaxies NGC 3626 , NGC 3659 , IC 685 are located in the same area of the sky .
The object was discovered on January 21, 1855 by the Irish astronomer RJ Mitchell , an assistant to William Parsons, 3rd Earl of Rosses .