M94 Croc's Eye Galaxy (urmymuse)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: M 94 · NGC 4736

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M94 Croc's Eye Galaxy

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M94 Croc's Eye Galaxy

My second go at M94 ... heavily cropped

Messier 94 (also known as NGC 4736) is a spiral galaxy in the constellation Canes Venatici. It was discovered by Pierre Méchain in 1781, and catalogued by Charles Messier two days later. Although some references describe M94 as a barred spiral galaxy, the "bar" structure appears to be more oval-shaped. The galaxy has two ring structures.

At least two techniques have been used to measure distances to M94. The surface brightness fluctuations distance measurement technique estimates distances to spiral galaxies based on the graininess of the appearance of their bulges. The distance measured to M94 using this technique is 17.0 ± 1.4 Mly (5.2 ± 0.4 Mpc). However, M94 is close enough that the Hubble Space Telescope can be used to resolve and measure the fluxes of the brightest individual stars within the galaxy. These measured fluxes can then be compared to the measured fluxes of similar stars within the Milky Way to measure the distance. The estimated distance to M94 using this technique is 15 ± 2 Mly (4.7 ± 0.6 Mpc). Averaged together, these distance measurements give a distance estimate of 16.0 ± 1.3 Mly (4.9 ± 0.4 Mpc).

M94 is one of the brightest galaxies within the M94 Group, a group of galaxies that contains between 16 and 24 galaxies. This group is one of many that lie within the Virgo Supercluster (i.e. the Local Supercluster).Although a large number of galaxies may be associated with M94, only a few galaxies near M94 appear to form a gravitationally bound system. Most of the other nearby galaxies appear to be moving with the expansion of the universe.

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Status	Advanced success
Started	...
Astrometry.net job	3282935
PixInsight job	HG28F32DCH0MZXILW17TU10DTDD9V3UL
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	12h50m54s.720
RA (top/left)	12h51m45s.632
RA (top/right)	12h50m12s.324
RA (bottom/right)	12h50m03s.958
RA (bottom/left)	12h51m36s.925

Dec (center)	+41°07′13″.45
Dec (top/left)	+41°13′36″.23
Dec (top/right)	+41°15′31″.28
Dec (bottom/right)	+41°00′49″.33
Dec (bottom/left)	+40°58′54″.97

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M94 Croc's Eye Galaxy

M94 Croc's Eye Galaxy

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