The Eridanus Cluster is a galaxy cluster roughly from Earth, containing about 73 main galaxies and about 200 total galaxies. About 30% have Hubble classifications of elliptical or S0 and the remaining 70% are spiral or irregular. These galaxies reside in smaller groups which are all loosely gravitationally bound to each other, suggesting that the system is still condensing from the Hubble flow and may eventually form a cluster of about 1014 . A low velocity dispersion compared to that of, for example, the Coma Cluster, supports this hypothesis. The Eridanus Cluster is located in the constellation Eridanus near the Fornax Cluster, and is sometimes called the "Fornax II Cluster".
Table of galaxies DesignationCoordinates (Epoch 2000)Apparent magnitude (blue)TypeAngular size (arcminutes)Diameter (kly)Recessional velocity (km/s) RA DecESO 547-09 03 06.0 –19 23 16.8 Irr 1.3 35 1509ESO 547-12 03 09.6 –17 50 16.5 Scd 1.5 351837NGC 1232 03 09.8 –20 35 10.7 SAB(rs)c 6.9 170 1517IC 1898 03 10.3 –22 24 13.7 SBc 3.4 85 1164ESO 547-20 03 13.0 –17 56 16.0 SBm 1.2 30 1825NGC 1258 03 14.1 –21 46 13.9 SBc 1.3 30 1340NGC 1297 03 19.2 –19 06 13.5 E 2.0 50 1395NGC 1300 03 19.7 –19 25 11.2 SBbc 6.0 110 1421NGC 1315 03 23.1 –21 23 14.0 S0 1.5 35 1534PGC 12680 03 23.4 –19 17 ? Irr 1.3 30 1400ESO 548-05 03 23.8 –19 45 14.7 SBm 1.5 35 1690NGC 1325 03 24.4 –21 33 12.3 SBbc 4.7 115 1446NGC 1325A 03 24.8 –21 20 13.6 SBcd 1.8 45 1188ESO 548-16 03 26.0 –21 20 15.6 Scd 1.7 40 1977NGC 1332 03 26.3 –21 20 11.4 E 4.2 105 1383ESO 548-21 03 27.6 –21 14 14.7 SBd 2.0 50 1541ESO 548-25 03 29.0 –22 09 15.0 SBa 1.3 30 1542NGC 1345 03 29.5 –17 47 14.3 SBc 1.4 35 1385ESO 481-30 03 29.6 –23 21 15.5 Scd 1.5 35 1504NGC 1347 03 29.7 –22 17 13.9 SBc 1.4 35 1624ESO 548-28 03 30.6 –17 56 14.0 S0 1.3 35 1360ESO 548-29 03 30.8 –21 03 14.3 SBbc 1.1 30 1175NGC 1353 03 32.1 –20 49 12.4 SBb 3.5 85 1390ESO 548-32 03 32.3 –17 43 15.8 SBm 1.6 40 1815ESO 548-33 03 32.5 –18 57 14.5 S0 1.3 35 1552ESO 548-34 03 33.0 –21 05 14.6 SBc 1.1 30 1610ESO 482-05 03 33.0 –24 08 15.2 SBcd 2.1 50 1783NGC 135703 33.2 –13 3912.4Sab3.2852018IC 1952 03 33.4 –23 43 13.5 SBbc 2.5 60 1683IC 1953 03 33.7 –21 29 12.7 SBc 2.6 65 1733NGC 1359 03 33.8 –19 29 13.0 SBm 2.1 55 1833NGC 1362 03 33.9 –20 17 14.2 S0 1.2 30 1085ESO 548-44 03 34.3 –19 25 14.2 S0 1.3 35 1561ESO 548-47 03 34.7 –19 02 14.1 S0 2.5 60 1472NGC 1367 03 35.0 –24 56 11.6 SBa 5.6 140 1344NGC 1370 03 35.2 –20 22 13.9 E 1.5 35 933IC 1962 03 35.6 –21 18 14.8 SBd 2.5 60 1670ESO 482-11 03 36.3 –25 36 14.7 Sbc 1.4 35 1469NGC 1377 03 36.7 –20 54 13.8 S0 1.7 45 1645NGC 1385 03 37.5 –24 30 11.5 SBc 3.7 90 1373NGC 1383 03 37.7 –18 20 13.8 S0 1.7 40 1828ESO 482-17 03 37.7 –22 55 14.9 Sab 1.3 30 1330NGC 1390 03 37.9 –19 00 14.9 SBa 1.3 35 1078NGC 1395 03 38.5 –23 02 10.7 E 5.6 140 1577NGC 1398 03 38.9 –26 20 10.5 SB(r)ab 7.1 135 1289NGC 1403 03 39.2 –22 23 14.1 E 1.3 30 1751NGC 1401 03 39.4 –22 43 13.7 S0 1.9 50 1406NGC 1400 03 39.5 –18 41 12.3 E 2.3 60 415ESO 548-63 03 39.6 –20 01 15.1 Sbc 1.4 35 1846ESO 548-65 03 40.0 –19 22 15.3 Sa 1.4 35 1102IC 343 03 40.1 –18 27 14.3 S0 1.4 35 1730NGC 1407 03 40.2 –18 35 10.9 E 5.1 125 1650ESO 548-68 03 40.3 –18 56 14.3 E 1.3 35 1636NGC 1412 03 40.5 –26 52 14.7 S0 1.4 35 1675ESO 548-70 03 40.7 –22 17 15.4 SBcd 1.6 40 1615ESO 482-32 03 40.7 –26 47 15.9 Irr 1.2 30 1621NGC 1415 03 40.9 –22 34 12.8 Sa 3.3 80 1451NGC 1414 03 41.0 –21 43 14.6 SBbc 1.6 40 1464ESO 482-35 03 41.2 –23 50 14.2 SBab 1.8 45 1756NGC 1422 03 41.5 –21 41 14.2 SBab 2.3 55 1514IC 346 03 41.7 –18 16 13.9 S0 1.9 45 1830ESO 548-79 03 41.9 –18 54 14.8 Sa 1.1 30 1914ESO 548-82 03 42.7 –17 30 15.4 Sbc 1.1 30 1590NGC 1426 03 42.8 –22 06 12.7 E 2.5 60 1296ESO 549-02 03 43.0 –19 01 14.9 SBm 1.3 30 988ESO 549-06 03 43.6 –21 14 15.7 Irr 1.3 30 1490NGC 1439 03 44.8 –21 55 12.4 E 2.6 65 1577NGC 1440 03 45.0 –18 16 12.9 S0 2.2 55 1403NGC 1438 03 45.3 –23 00 13.3 SBa 2.0 50 1438NGC 1452 03 45.4 –18 38 12.9 Sa 2.3 60 1619ESO 549-18 03 48.2 –21 28 13.3 SBc 2.5 60 1473ESO 482-46 03 49.7 –27 00 13.7 Sc 3.5 90 1422ESO 482-49 03 52.4 –23 03 15.3 Sc 1.1 30 1377NGC 1482 03 54.6 –20 30 13.3 S0 2.2 55 1753
See also List of galaxy clusters Coma Cluster Fornax Cluster Norma Cluster Virgo Cluster
References