NGC 4151 & NGC 4145
Barred spiral galaxy in the constellation of Canes Venatici.
Barred spiral galaxy in the constellation of Canes Venatici.
NGC 4151, also known as "Sauron's Eye", is a barred spiral galaxy with an active Hubble-type SBab galaxy nucleus in the constellation of Canes Venatici in the northern sky. NGC 4145 is also a Barred Spiral Galaxy of the Hubble type SBcd.
| Object: | NGC 4151, NGC 4145 |
| Date of exposures: | 26.03.2020, 27.03.2020 |
| Distance: | 46 Mio. Lightyears |
| Exposures: | Lum: 101 x 180 Sec., RGB: 210 x 180 Sec., Sum: 15,6 hrs. |
| Telescope: | 10'', F4 Newton |
| Focal length: | 1000 mm |
| Filter: | Astrodon LRGB, E-Series |
| Camera: | ASI 1600 MMC Pro |
| Guiding: | Off Axis Guider, Lodestar |
| Mount: | EQ8 |
The galaxies NGC 4151 and 4145 are estimated to be 46-47 million light years away from the Milky Way. NGC 4151 has a diameter of about 85,000 light years. Together with NGC 4156 and PGC 38756 it forms the galaxy trio Holm 345.
At the center of the galaxy is a supermassive black hole, which emits X-rays. The exact origin of this radiation is still unknown (as of March 2011). On April 1, 2018, the Type II supernova SN 2018aoq was catalogued as part of the Lick Observatory Supernova Search (LOSS). The object as such was discovered by William Herschel on 17 March 1787.
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