NGC 4151
| Galaxy NGC 4151 |
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|---|---|
![LEDA 38811, NGC 4156 & NGC 4151 [1] taken with the 81 cm reflecting telescope at the Mount Lemmon Observatory.](https://de.wikipedia.org/wiki/Datei:NGC4151_Galaxy_from_the_Mount_Lemmon_SkyCenter_Schulman_Telescope_courtesy_Adam_Block.jpg)
|
|
| LEDA 38811, NGC 4156 & NGC 4151 taken with the 81 cm reflecting telescope at the Mount Lemmon Observatory . | |
| AladinLite | |
| Constellation | Hunting dogs |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 12 h 10 m 32.6 s |
| declination | + 39 ° 24 ′ 21 ″ |
| Appearance | |
| Morphological type | (R ') SAB (rs) from: / Sy1.5 |
| Brightness (visual) | 10.3 mag |
| Brightness (B-band) | 11.1 mag |
| Angular expansion | 6.3 ′ × 4.5 ′ |
| Position angle | 146 ° |
| Surface brightness | 13.8 mag / arcmin² |
| Physical data | |
| Affiliation | WBL 383-001 |
| Redshift | 0.003319 ± 0.000010 |
| Radial velocity | 995 ± 3 km / s |
|
Stroke distance v rad / H 0 |
(46 ± 3) x 10 6 ly (14.0 ± 1.0) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | March 17, 1787 |
| Catalog names | |
| NGC 4151 • UGC 7166 • PGC 38739 • CGCG 215-045 • MCG + 07-25-044 • IRAS Z12080 + 3940 • KUG 1208 + 396A • 2MASX J12103265 + 3924207 • GC 2756 • H I 165 • h 1111 • NVSS J121032 + 392420 • HOLM 345A • LDCE 867 NED084 | |
NGC 4151 , also known as " Sauron's Eye ", is a bar-spiral galaxy with an active nucleus of the Hubble-type SBab in the constellation Hounds in the northern sky . It is an estimated 46 million light years from the Milky Way and about 85,000 light years in diameter. Together with NGC 4156 and PGC 38756 , it forms the galaxy trio Holm 345 .
In the center of the galaxy there is a supermassive black hole that emits X- rays. The exact origin of this radiation has not yet been clarified (as of March 2011).
Multispectral image of NGC 4151. Blue: X-rays , Yellow: Optical , Red: Radio waves
High-resolution image from the Hubble Space Telescope
On April 1, 2018, the type II supernova SN 2018aoq was discovered as part of the Lick Observatory Supernova Search (LOSS) .
The object was discovered by William Herschel on March 17, 1787 .
Web links
- SIMBAD Astronomical Database
- scinexx.de: Astronomers measure "Sauron's Eye" November 27, 2014
Individual evidence
- ^ Aladin Lite
- ↑ a b c d e NASA / IPAC EXTRAGALACTIC DATABASE
- ↑ a b c d e SEDS : NGC 4151
- ↑ NGC 4151: An active black hole in the "Eye of Sauron" . Astronomy magazine. March 11, 2011. Retrieved March 20, 2011.
- ↑ Spektrum.de
- ↑ Simbad
- ↑ Seligman