NGC 3644
| Galaxy NGC 3644 |
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|---|---|
![NGC 3644 with LEDA 1237463 (lu) & SDSS J112127.16 + 024727.2 (ru) [1]](https://de.wikipedia.org/wiki/Datei:NGC3644_-_SDSS_DR14.jpg)
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| NGC 3644 with LEDA 1237463 (lu) & SDSS J112127.16 + 024727.2 (ru) | |
| AladinLite | |
| Constellation | lion |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 11 h 21 m 32.873 s |
| declination | + 02 ° 48 ′ 37.58 ″ |
| Appearance | |
| Morphological type | (R ') SBa |
| Brightness (visual) | 14.2 mag |
| Brightness (B-band) | 15.1 mag |
| Angular expansion | 1.5 'x 0.7' |
| Position angle | 63 ° |
| Surface brightness | 14.1 mag / arcmin² |
| Physical data | |
| Affiliation | isolated WBL 324 |
| Redshift | 0.023770 ± 0.000063 |
| Radial velocity | 7126 ± 19 km / s |
|
Stroke distance v rad / H 0 |
(313 ± 22) x 10 6 ly (96.0 ± 6.7) Mpc |
| history | |
| discovery | Albert Marth |
| Discovery date | March 22, 1865 |
| Catalog names | |
| NGC 3644 • IC 684 • UGC 6373 • PGC 34814 • CGCG 039-139 • MCG + 01-29-037 • 2MASX J11213286 + 0248379 • 2MASS J11213286 + 0248379 • WISEA J112132.86 + 024838.0 • SIG 558 | |
NGC 3644 = IC 684 is a bar-spiral galaxy of the Hubble type SBa in the constellation Leo on the ecliptic . It is estimated to be 313 million light years from the Milky Way and about 140,000 light years in diameter.
In the same area of the sky are u. a. the galaxies NGC 3630 , NGC 3643 , NGC 3647 , IC 683 .
The Type Ia supernova SN 1996V was observed here.
The object was discovered by Albert Marth on March 22, 1865 .