Coma Berenices
Axarquia, Costa del Sol, Andalucia, Spain

CONSTELLATION OF COMA BERENICES

Name: Coma Berenices
Abbreviation: Com
Meaning: Berenice´s hair
Right Ascension: 12.76h
Declination: +21.83º
Area (Degrees squared): 386
Stars with known planets: 2
Bordering Constellations: Canes Venatici, Ursa Major, Leo, Virgo, Bootes

Visible at latitudes between +90º and -70º and best at 21.00h during May. In the northern hemisphere, the constellation of Coma Berenices is considered a springtime constellation, visible between February and September depending on the time of night.

Coma Berenices is one of the few constellations to owe its name to an historical figure. Queen Berenice II of Egypt was the wife of Ptolemy III Euergetes (246-221BC), the king under whom Alexandria became an important cultural centre.

Coma Berenices
Coma Berenices
Observations
Deep Sky Objects:
Although Coma Berenices is not a large constellation, it contains eight Messier objects. The constellation is rich in galaxies, containing the northern part of the Virgo cluster. There are also several globular clusters to be seen. These objects can be seen with minimal obscuration from dust because the constellation is not in the direction of the galactic plane. However, because of this fact, there are few open clusters (except for the Coma Berenices Cluster, which dominates the northern part of the constellation), diffuse nebulae, or planetary nebulae.

The Virgo Cluster, also known as the Coma-Virgo Cluster, is about 60,000,000 million light years away from Earth. Those contained in Coma Berenices are:
M85 - a Lenticular Galaxy that is one of the brighter members of the cluster.
M88 - a spiral Galaxy with multiple arms.
M91 - a Barred Spiral Galaxy.
M98 - a bright, elongated Spiral Galaxy that is seen nearly edge-on. It has a small nucleus and faint but vast spiral arms.
M99 - another Spiral Galaxy, about 1.5º southeast of M98. Known as the Coma Pinwheel Galaxy or the Triangulum Galaxy.
M100 - a Spiral Galaxy. At 7 arcminutes across, it has the largest apparent size of any galaxy in the Virgo cluster. Its diameter is over 120,000 light years, making it among the largest spiral galaxies in the Virgo cluster.

Other Galaxies:
The Coma cluster of galaxies is to the north of the Virgo cluster. At 230 to 300million light years distant, it lies much further away however than the Coma-Virgo cluster. This cluster is quite large, containing at least 1,000 large galaxies and up to 30,000 smaller ones. A survey by Fritz Zwicky in 1957 identified 29,951 galaxies in the area that are brighter than 19.0 magnitude.

Due to the great distance to the cluster, most of the galaxies are only visible in large telescopes. The brightest members are NGC 4889 and NGC 4874, both of which are of thirteenth magnitude, with most of the other members being of fifteenth magnitude or dimmer. NGC 4889 is a giant elliptical galaxy. The Coma cluster contains comparatively few spiral galaxies. NGC 4921 is the brightest among them.

M64 - a Spiral Galaxy known as The Black Eye Galaxy, relatively close at just 17,000,000 light years.

NGC 4565 - a Spiral Galaxy known as the Needle Galaxy, seen edge-on. With an apparent length of 16 arcminutes, it has the largest apparent size of any galaxy seen edgewise from Earth. It appears quite thin and has a dark dust lane.

Other Messier Objects:
M53 - a Globular Cluster, visible in binoculars.

Numbered Stars with Magnitudes:
1. +4.30
2. +4.20
3. +4.35

In-Site Links:
Constellations Index Constellations General Seasons
Top Night Skies Directory
Planets:
Mercury Venus Mars Jupiter
Saturn Uranus Neptune Pluto
Other Links:

Click here to email us! Direct to Axarquia!