Groups and Clusters of Galaxies with Messier objects
Galaxies are usually members of
groups or clusters, and those listed in Messier's
catalog are no exceptions. Below please find those groups containing Messier
Groups of Galaxies containing at least two Messier objects
Ordered roughly by Right Ascension.
Local Group of Galaxies
The Andromeda Galaxy
and its satellites
as well as the Triangulum galaxy
Other members (over 30 in all) include our
Milky Way Galaxy, the
Large and the
Small Magellanic Cloud
SMC), as well as several
smaller galaxies. It is also somehow associated with the
group around the large elliptical Maffei1.
This group is very nearby, only some 11 million light-years distant.
Other members include
NGC 3077 and
NGC 2976, an outlying member of the
group is NGC 2403.
M96 group (Leo I group)
There are many more galaxies in this group, including NGC 3384 in the
same field as M105.
Leo triplett (M66 group)
M65 (NGC 3623),
M66 (NGC 3627)
and NGC 3628.
Probably physically related to the M96 group.
Ursa Major Cloud
Messier objects (probable members):
A large and vast cloud of galaxies of at least 79 member galaxies.
Virgo Cluster of Galaxies
(or Coma-Virgo Cluster)
The Virgo Cluster with its some 2000 member galaxies dominates our
intergalactic neighborhood, as it represents the physical center of our
Local Supercluster, and influences all the galaxies and galaxy groups
by the gravitational attraction of its enormous mass. Our Local Group
has experienced a speed-up of 100..400 km/sec towards this cluster
(the Virgo-centric flow), and it is still unclear if at one time it will
fall and merge into the cluster. HST observations of Cepheids in M100,
together with the work of
Nial R. Tanvir on the
M96 group extrapolated to this cluster,
indicate that the Virgo cluster is at a distance of some 60 million
M94 Group, CVn I Cloud
This vast and loose group or cloud of galaxies is listed by various sources
but not in R. Brent Tully's Nearby Galaxies Catalog.
Further Messier galaxies contained in groups
The following list contains the Messier galaxies which are members of
groups but not listed above; usually, some info on the corresponding
groups is included in the object pages for these galaxies. It is ordered
roughly by Right Ascension again.
- M74 is probably the chief member of a small
physical group of galaxies
(the M74 group)
- M77 is the dominating member of a small but
remarkable group of galaxies, the
M77 group (sometimes also called
the NGC 1068 group).
- M106 is the brightest member of the
Canes Venatici II (CVn II) group or
M106 group of galaxies
- M104 is the dominating member of a small
group called the M104 group or
NGC 4594 group of galaxies.
- M83 forms the
M83 group together with some
conspicuous but quite southern galaxies, including
Centaurus A (NGC 5128)
and the unusual galaxy NGC 5253.
This group is sometimes also referred to as Centaurus A group or
NGC 5128 group.
- M101 forms the
M101 group of at least
9 galaxies with several faint companions.
Some sources suppose some physical connection with the M51 group but this
- The M102 candidate
NGC 5866 is the brightest member of a
conspicuous group of galaxies in Draco, the
NGC 5866 group, which
contains (besides NGC 5866) the bright edge-on spiral
NGC 5907, NGC 5879,
and a lot of fainter galaxies.
Last Modification: November 14, 2004