Black Eye Galaxy
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| The Black Eye Galaxy (M64) | |
| Observation data Epoch J2000 |
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| Constellation | Coma Berenices[2] |
| Right ascension | 12h 56m 43.7s[3] |
| Declination | +21° 40′ 58″[3] |
| Apparent dimension (V) | 10.71 × 5.128 moa[4] |
| Apparent magnitude (V) | 9.36[3] |
| Characteristics | |
| Type | (R)SA(rs)ab, HIISy2 |
| Astrometry | |
| Heliocentric radial velocity | 408 ± 4[3]km/s |
| Redshift | 0.001361 ± 0.000013[3] |
| Galactocentric velocity | 400 ± 4 km/s |
| Distance | 24 ± 7[5] Mly (7.36 ± 2.15 Mpc) |
| Other designations | |
| Database references | |
| SIMBAD | Search M64 data
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| See also: Galaxy, List of galaxies | |
The Black Eye Galaxy (also called Evil Eye Galaxy; designated Messier 64, M64, or NGC 4826) was discovered by Edward Pigott in March 1779, and independently by Johann Elert Bode in April of the same year, as well as by Charles Messier in 1780. It has a spectacular dark band of absorbing dust in front of the galaxy's bright nucleus, giving rise to its nicknames of the "Black Eye" or "Evil Eye" galaxy. M64 is well known among amateur astronomers because of its appearance in small telescopes. It is a spiral galaxy in the Coma Berenices constellation.
Properties
The interstellar medium of Messier 64 comprises two counter-rotating disks which are approximately equal in mass.[6] The inner disk contains the prominent dust lanes of the galaxy. The stellar population of the galaxy exhibits no measurable counter-rotation.[7] Possible formation scenarios include a merger with a gas-rich satellite galaxy in a retrograde orbit, or the continued accretion of gas clouds from the intergalactic medium.[6][7]
References
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 4.0 4.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ This number has been estimated from 17Mly to even higher numbers than 24Mly. I feel it would be safe to say a distance error of 7 Mly would be sufficient to cover most estimates.
- ↑ 6.0 6.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 7.0 7.1 Lua error in package.lua at line 80: module 'strict' not found.
External links
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Wikimedia Commons has media related to Lua error in package.lua at line 80: module 'strict' not found.. |
- Messier 64, SEDS Messier pages
- Hubblesite description and high resolution images
- ESA/Hubble images of M64
- APOD for August 2, 2007
- The Black Eye Galaxy on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- a real photo by Pete Albrecht
- Black Eye Galaxy (M64) at Constellation Guide
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