The Leo I group is a very famous group of galaxies because it contains a lot of bright galaxies. On the right is the M96 subgroup and on the left is the M66 subgroup which are connected to each other via NGC 3489 which lies between them.
Below - three bright galaxies in the M96 subgroup. M95 (left) and M96 (centre) are both classified as barred spiral galaxies. NGC 3377 (right) is a bright elliptical galaxy.
M95 | M96 | NGC 3377 |
Below - three more galaxies associated with the M96 subgroup. M105 (left) and NGC 3384 (centre) are two more bright elliptical galaxies. NGC 3489 (right) is a lenticular galaxy (lenticular galaxies are much flatter than elliptical galaxies) which lies inbetween the M96 and M66 subgroups.
M105 | NGC 3384 | NGC 3489 |
This is a list of the main galaxies in the Leo I group. This group contains twelve galaxies with a diameter above thirty thousand light years.
1 2 3 4 5 6 7 8 9 Name Equatorial Blue Type Size Size RV Other Coordinates Mag (') kly km/s Names RA Dec NGC 3239 10 25.1 +17 10 11.7 Irr 4.5 45 1078 NGC 3299 10 36.4 +12 42 14.1 SBd 1.9 20 977 PGC 31877 10 42.0 +12 20 16.8 S0 0.6 5 1116 M95 10 44.0 +11 42 10.5 SBb 7.6 75 1117 NGC 3351 M96 10 46.8 +11 49 10.1 SBa 7.8 80 1237 NGC 3368 PGC 83339 10 46.9 +13 00 17.3 Irr 1.2 10 1171 NGC 3377A 10 47.4 +14 04 14.3 SBm 1.8 20 905 UGC 5889 PGC 83341 10 47.5 +13 53 17.5 Sc 0.5 5 909 NGC 3377 10 47.7 +13 59 11.1 E 4.4 45 1026 M105 10 47.8 +12 35 10.2 E 5.1 50 1217 NGC 3379 NGC 3384 10 48.3 +12 38 10.8 E 5.4 55 1066 PGC 32348 10 48.9 +14 07 16.1 E? 0.8 10 973 UGC 5923 10 49.1 +06 55 14.1 Sa 0.9 10 1061 NGC 3412 10 50.9 +13 25 11.4 S0 3.7 40 1191 NGC 3489 11 00.3 +13 54 11.1 S0 3.5 35 1031 NGC 3593 11 14.6 +12 49 11.8 S0 5.2 55 969 M65 11 18.9 +13 06 10.2 SBa 9.1 95 1146 NGC 3623 M66 11 20.2 +13 00 9.6 SBb 8.7 90 1066 NGC 3627 NGC 3628 11 20.3 +13 35 10.3 Sb 12.9 130 1184 IC 2787 11 23.3 +13 38 16.0 Sc 0.8 10 1081 |
Column 1: The usual name of the galaxy. Column 2: The Right Ascension for epoch 2000. Column 3: The Declination for epoch 2000. Column 4: The blue apparent magnitude of the galaxy. Column 5: The galaxy type: E=Elliptical, S0=Lenticular, Sa,Sb,Sc,Sd=Spiral, SBa,SBb,SBc,SBd=Barred Spiral, Sm,SBm,Irr=Irregular. Column 6: The angular diameter of the galaxy (arcminutes). Column 7: The diameter of the galaxy (thousands of light years). Column 8: The recessional velocity (km/s) of the galaxy relative to the cosmic microwave background. Column 9: Other names of the galaxy. References: Ferguson H, Sandage A, (1990), Population studies in groups and clusters of galaxies. III - A catalog of galaxies in five nearby groups. Astron J, 100, 1. Giuricin G, Marinoni C, Ceriani L, Pisani A, (2000), Nearby optical galaxies: selection of the sample and identification of groups. Astrophys J, 543, 178. Garcia A, (1993), General study of group membership. II. Determination of nearby groups. Astron Astrophys Supp, 100, 47. Fouqué P, Gourgoulhon E, Chamaraux P, Paturel G, (1992), Groups of Galaxies within 80 Mpc, Astron and Astrophys Supp, 93, 211. The HyperLeda Database, (2003).
Below - three galaxies in the M66 subgroup. NGC 3593 (left) is a lenticular galaxy with some lanes of dust near the middle of it. M65 (centre) and M66 (right) are two bright barred spiral galaxies.
NGC 3593 | M65 | M66 |
Shown below is NGC 3628. This is a superb example of an edge-on spiral galaxy. Like most spiral galaxies, the disk of this galaxy filled is with dark clouds of dust.
Properties of the Leo I Group | |
---|---|
Equatorial Coordinates | RA=11h00m Dec=+13° |
Galactic Coordinates | l=235° b=+60° |
Supergalactic Coordinates | L=95° B=-25° |
Distance to the centre of the group | 35 million light years |
Number of large galaxies in the group | 12 |
Alternative names for the group | M66/M96 Group |