NGC 1084
| Galaxy NGC 1084 |
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|---|---|
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| Photo from the Hubble Space Telescope | |
| AladinLite | |
| Constellation | Eridanus |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 02 h 45 m 59.9 s |
| declination | -07 ° 34 ′ 42 ″ |
| Appearance | |
| Morphological type | SA (s) c / HII |
| Brightness (visual) | 10.7 mag |
| Brightness (B-band) | 11.4 mag |
| Angular expansion | 2.8 ′ × 1.4 ′ |
| Position angle | 30 ° |
| Surface brightness | 12.0 mag / arcmin² |
| Physical data | |
| Affiliation | LGG 71 |
| Redshift | (+4693 ± 13) · 10 −6 |
| Radial velocity | 1407 ± 4 km / s |
|
Stroke distance v rad / H 0 |
(62 ± 4) · 10 6 ly (19.1 ± 1.3) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | January 10, 1785 |
| Catalog names | |
| NGC 1084 • PGC 10464 • MCG -01-08-07 • IRAS 02435-0747 • KUG 0243-077 • GC 604 • H I 64 • h 264 • LDCE 0182 NED007 | |
NGC 1084 is a Sc-type spiral galaxy in the constellation Eridanus , about 62 million light years from the Milky Way. It has a diameter of around 50,000 light years, an estimated total mass of 50 billion solar masses and rotates at a maximum speed of 170 kilometers per second.
The galaxy is characterized by a high rate of star formation that extends over its entire spiral arms . A recent merger with a dwarf galaxy is assumed to be the most likely cause . As a result of the increased formation of massive stars, supernovae occur unusually frequently in NGC 1084: Within just 50 years, five supernova explosions were observed in this galaxy , which are systematically named 1963P , 1996an , 1998dl , 2009H and 2012ec , with the first four being Numbers indicate the year.
The galaxy was discovered by William Herschel on January 10, 1785 .
