NGC 3640
| Galaxy NGC 3640 |
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|---|---|
![NGC 3640 with SDSS J112113.46 + 031300.4 (lu) [1] SDSS image](https://de.wikipedia.org/wiki/Datei:NGC3640_-_SDSS_DR14.jpg)
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| NGC 3640 with SDSS J112113.46 + 031300.4 (lu) SDSS image | |
| AladinLite | |
| Constellation | lion |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 11 h 21 m 06.85 s |
| declination | + 03 ° 14 ′ 05.4 ″ |
| Appearance | |
| Morphological type | E3 |
| Brightness (visual) | 10.3 mag |
| Brightness (B-band) | 11.3 mag |
| Angular expansion | 4 ′ × 3.2 ′ |
| Position angle | 100 ° |
| Surface brightness | 13.1 mag / arcmin² |
| Physical data | |
| Affiliation | WBL 324 ( Leo II group ) NGC 3640 group LGG 233 |
| Redshift | 0.004330 ± 0.000017 |
| Radial velocity | 1298 ± 5 km / s |
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Stroke distance v rad / H 0 |
(53 ± 4) · 10 6 ly (16.2 ± 1.1) Mpc |
| diameter | 110,000 ly |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | February 23, 1784 |
| Catalog names | |
| NGC 3640 • UGC 6368 • PGC 34778 • CGCG 039-130 • MCG + 01-29-033 • 2MASX J11210685 + 0314051 • GC 2386 • H II 33 • h 864 • GALEX ASC J112106.80 + 031405.9 • LDCE 798 NED003 | |
NGC 3640 is an elliptical galaxy of Hubble type E3 in the constellation Leo on the ecliptic . It is an estimated 53 million light years from the Milky Way and about 110,000 light years in diameter. She is the brightest member of the NGC 3640 group ( LGG 233 ).
In the same area of the sky are u. a. the galaxies NGC 3630 , NGC 3641 , NGC 3643 , NGC 3645 .
The object was discovered by Wilhelm Herschel on February 23, 1784 .
NGC 3640 group ( LGG 233 )
| Galaxy | Alternative name | Distance / million ly |
|---|---|---|
| NGC 3611 | PGC 34478 | 66 |
| NGC 3630 | PGC 34698 | 62 |
| NGC 3640 | PGC 34778 | 53 |
| NGC 3641 | PGC 34780 | 74 |
| NGC 3664 | PGC 35041 | 57 |
| PGC 34696 | UGC 6345 | 66 |
| PGC 35042 | NGC 3664A | 54 |