Leo Cloud


The Leo II Groups, Leo II Cloud, or simply the Leo Cloud is a galaxy filament consisting of at least 18 galaxy groups. It is located approximately 86 Mly from the Solar System. The Leo Cloud in supergalactic SGY coordinates is physically behind the Virgo Cluster. Eventually, over the next Hubble time, the galaxy groups that make up the Leo II Cloud will infall and merge with the Virgo Cluster.
The Leo Cloud, along with the Crater Cloud which contains the NGC 4038 Group, is actually part of the same branch of a larger galaxy filament that extends from the Centaurus Cluster through the Virgo Cluster and continues through the Ursa Major Cluster, known as the Virgo Strand. The Virgo Strand is the main component of the Virgo Supercluster and is made of two branches with the lower branch consisting of the Leo and Crater clouds, while the upper branch is known as the Virgo Southern Extension or Virgo II Groups.
The Leo Cloud itself is actually composed of two filaments, the Leo II A and Leo II B filaments. The Leo II A filament consists of the majority of the cloud, while the Leo II B filament consists of a sparse region of the cloud.
The Leo Cloud, like the Virgo III Cloud, is prolate and points toward the Virgo Cluster.

List of groups

Below is a list of groups in the Leo Cloud according to astronomer Brent Tully.
Name of groupR.A. Dec. Number of membersBrightest memberRedshiftDistance Cross-ID
NBGC 21-111h 24m 25.6s17d 22m 44s
  • 11
  • 11
  • 8
  • 10/16/16
NGC 36070.00400068NGC 3607 Group, Leo II Group, GHCG 77, TG 36, DV 49, GrG 48, 65, 66, NGC 3626 Group, NGC 3507 Group, LGG 228, NGC 3686 Group, LGG 237, NOGG H 527, NOGG P1 532, NOGG P2 542
NBGC 21-211h 02m 47.3s17d 59m 22s
  • 3
    		• NGC 35010.00376966
    NBGC 21-310h 50m 45.0s17d 20m 49s
  • 10
  • 6
  • 5
  • 10/13/13
    		• NGC 33700.00427372NGC 3370 Group, LGG 219, NGC 3507 Group, NOGG H 497, P1 512, P2 522
    NBGC 21-411h 39m 35.688s11d 47m 29.33s
  • 2
  • 2
    		• NGC 38100.00330960NGC 3810 Group, NOGG P1 561, NOGG NOGG P2 570
    NBGC 21-510h 44m 0.8.6s13d 40m 30s
  • 3
  • 3
  • 4
  • 4
    		• NGC 33380.00428673NGC 3338 Group, LGG 219, NOGG H 480, NOGG P1 498, NOGG P2 501
    NBGC 21-610h 21m 35.2s21d 07m 41s
  • 12
  • 5/8
  • 13
  • 8/7/7
    		• NGC 31900.00467077NGC 3190 Group, NGC 3227 Group, LGG 194, NOGG H 454, NOGG P1 469, NOGG P2 476
    NBGC 21-711h 03m 36.558s28d 00m 22.56s
  • 2
  • 6
  • 2
    		• NGC 35040.00507482NGC 3504 Group, LGG 227, NOGG P1 519, NOGG P2 529
    NBGC 21-810h 28m 55.4s28d 47m 52s
  • 4
  • 4
  • 5
  • 5
    		• NGC 32540.00461075NGC 3254 Group, LGG 197, NOGG H 465, NOGG P1 479, NOGG P2 486
    NBGC 21-910h 51m 46.7s32d 51m 31s
  • 4
  • 5
  • 6
  • 4
    		• NGC 34300.00500080NGC 3396 Group, LGG 218, NGC 3430 Group, NOGG H 490, NOGG P1 500, NOGG P2 510
    NBGC 21-1010h 13m 57.0s03d 23m 20s
  • 5
  • 3
  • 5
  • 4
    		• NGC 31690.00359964NGC 3166 Group, NGC 3169 Group, LGG 192, NOGG H 446, NOGG P1 463, NOGG P2 470
    NBGC 21-1111h 20m 41.4s03d 15m 19s
  • 5
  • 5
  • 6
  • 3
    		• NGC 36400.00420372NGC 3640 Group, LGG 233, NOGG H 522, NOGG P1 536, NOGG P2 546
    NBGC 21-1209h 49m 43.946s32d 53m 48.99s
  • 10
  • 3
  • 4
    		• NGC 30030.00493778NGC 2964 Group, NGC 3003 Group, NOGG H 420, NOGG P1 433, NOGG P2 442
    NBGC 21-1309h 50m 54.242s28d 32m 57.12s
  • 2
  • 2
    		• NGC 30260.00492379NGC 3026 Group, NOGG H 426, NOGG P1 440, NOGG P2 448
    NBGC 21-1409h 59m 53.783s37d 16m 13.72s
  • 2
  • 2
    		• UGC 53490.00459073UGC 5349 Group, NOGG P1 452, NOGG P2 459
    NBGC 21-1509h 24m 18.857s34h 30m 45.59s
  • 2
  • 3
    		• NGC 28590.00563186NGC 2859 Group, NOGG H 391, NOGG P1 403, NOGG P2 412
    NBGC 21-1609h 17m 27.179s41h 59m 50.20s
  • 2
  • 2/3/3
    		• NGC 27980.00580187NGC 2798 Group, NOGG H 385, NOGG P1 395, NOGG P2 405
    NBGC 21-1709h 23m 14.210s40h 09m 52.75s
  • 3
  • 2/3/2
    		• NGC 28440.00493779NGC 2852 Group, NOGG H 389, NOGG P1 401, NOGG P2 410
    NBGC 21-1809h 12m 35.3s34h 59m 06s
  • 5
  • 3
  • 4/4/3
    		• NGC 27700.007000104RSCG 30, NGC 2778 Group, LGG 171, NGC 2770 Group, NOGG H 381, NOGG P1 391, NOGG P2 401