Hickson Compact Groups of galaxies
Hickson Compact Groups (HCG) are groups of four or more galaxies that are gravitationally interacting and appear physically close. There are 100 Hickson groups.
| HCG # | Constellation | Galaxies |
| Hickson 1 | Andromeda | 4 |
| Hickson 2 | Pisces | 4 |
| Hickson 3 | Cetus | 4 |
| Hickson 4 | Cetus | 5 |
| Hickson 5 | Pisces | 4 |
| Hickson 6 | Cetus | 4 |
| Hickson 7 | Cetus | 4 |
| Hickson 8 | Andromeda | 4 |
| Hickson 9 | Cetus | 4 |
| Hickson 10 | Andromeda | 4 |
| Hickson 11 | Cetus | 4 |
| Hickson 12 | Cetus | 5 |
| Hickson 13 | Cetus | 5 |
| Hickson 14 | Cetus | 4 |
| Hickson 15 | Cetus | 6 |
| Hickson 16 | Cetus | 4 |
| Hickson 17 | Aries | 5 |
| Hickson 18 | Aries | 4 |
| Hickson 19 | Cetus | 4 |
| Hickson 20 | Aries | 6 |
| Hickson 21 | Eridanus | 5 |
| Hickson 22 | Eridanus | 5 |
| Hickson 23 | Eridanus | 5 |
| Hickson 24 | Eridanus | 4 |
| Hickson 25 | Cetus | 7 |
| Hickson 26 | Eridanus | 4 |
| Hickson 27 | Eridanus | 5 |
| Hickson 28 | Eridanus | 4 |
| Hickson 29 | Eridanus | 4 |
| Hickson 30 | Eridanus | 4 |
| Hickson 31 | Eridanus | 4 |
| Hickson 32 | Lepus | 4 |
| Hickson 33 | Taurus | 4 |
| Hickson 34 | Orion | 4 |
| Hickson 35 | Lynx | 6 |
| Hickson 36 | Cancer | 4 |
| Hickson 37 | Cancer | 5 |
| Hickson 38 | Leo | 4 |
| Hickson 39 | Hydra | 4 |
| Hickson 40 | Hydra | 6 |
| Hickson 41 | Ursa Major | 4 |
| Hickson 42 | Hydra | 4 |
| Hickson 43 | Sextans | 5 |
| Hickson 44 | Leo | 4 |
| Hickson 45 | Ursa Major | 4 |
| Hickson 46 | Leo | 4 |
| Hickson 47 | Leo | 4 |
| Hickson 48 | Hydra | 4 |
| Hickson 49 | Ursa Major | 4 |
| Hickson 50 | Ursa Major | 5 |
| Hickson 51 | Leo | 6 |
| Hickson 52 | Leo | 4 |
| Hickson 53 | Leo | 4 |
| Hickson 54 | Leo | 4 |
| Hickson 55 | Draco | 5 |
| Hickson 56 | Ursa Major | 5 |
| Hickson 57 | Leo | 7 |
| Hickson 58 | Leo | 5 |
| Hickson 59 | Leo | 5 |
| Hickson 60 | Ursa Major | 4 |
| Hickson 61 | Coma Berenices | 4 |
| Hickson 62 | Virgo | 4 |
| Hickson 63 | Centaurus | 4 |
| Hickson 64 | Virgo | 4 |
| Hickson 65 | Hydra | 5 |
| Hickson 66 | Ursa Major | 4 |
| Hickson 67 | Virgo | 4 |
| Hickson 68 | Canes Venatici | 5 |
| Hickson 69 | Bootes | 4 |
| Hickson 70 | Canes Venatici | 6 |
| Hickson 71 | Bootes | 4 |
| Hickson 72 | Bootes | 5 |
| Hickson 73 | Bootes | 5 |
| Hickson 74 | Serpens | 5 |
| Hickson 75 | Serpens | 6 |
| Hickson 76 | Serpens | 5 |
| Hickson 77 | Serpens | 4 |
| Hickson 78 | Draco | 4 |
| Hickson 79 | Serpens | 6 |
| Hickson 80 | Draco | 4 |
| Hickson 81 | Hercules | 4 |
| Hickson 82 | Hercules | 4 |
| Hickson 83 | Hercules | 4 |
| Hickson 84 | Ursa Minor | 6 |
| Hickson 85 | Draco | 4 |
| Hickson 86 | Sagittarius | 4 |
| Hickson 87 | Capricornus | 4 |
| Hickson 88 | Aquarius | 4 |
| Hickson 89 | Aquarius | 4 |
| Hickson 90 | Piscis Austrinus | 4 |
| Hickson 91 | Piscis Austrinus | 4 |
| Hickson 92 | Pegasus | 5 |
| Hickson 93 | Pegasus | 5 |
| Hickson 94 | Pegasus | 7 |
| Hickson 95 | Pegasus | 4 |
| Hickson 96 | Pegasus | 4 |
| Hickson 97 | Pisces | 5 |
| Hickson 98 | Pisces | 4 |
| Hickson 99 | Pisces | 4 |
| Hickson 100 | Pisces | 4 |