Cepheid variable stars play a fundamental role in astronomy because they are standard candles in calibrating the cosmic distance scale via the period-luminosity relationship. As of June 2022, Cepheids have been discovered in 96 galaxies beyond the Milky Way. The total number of known Cepheid variable stars exceeds 20000 (not counting the ones announced in Gaia DR2).
The construction of the data base is in progress and has not been finished yet. Data on variables in galaxies hosting largest numbers of known Cepheids (Small Magellanic Cloud, Large Magellanic Cloud, M31, etc.) will be uploaded at a later phase of the project. Until now we have 6975 cepheids in 97 galaxies.
| Galaxy | Number of known Cepheids | Membership | Revised Hubble type | Remark |
|---|---|---|---|---|
| Andromeda | 2686 | Local Group | Sb | LINER type AGN |
| Andromeda II dwarf | 0 | Local Group | dSph | |
| Andromeda III dwarf | 5 | Local Group | dSph | |
| Andromeda VI dwarf | 6 | Local Group | dSph | |
| Andromeda XXI dwarf | 9 | Local Group | dSph | |
| Andromeda XXV dwarf | 3 | Local Group | dSph | |
| Aquarius dwarf | 75 | Local Group | dSph | |
| Canes Venatici I | 3 | Local Group | dSph | |
| Carina dwarf | 14 | Local Group | dSph | |
| Centaurus A | 51 | Centaurus A Group | Pec | Seyfert II galaxy |
| Cetus dwarf | 3 | Local Group | dSph | |
| DDO 155 | 1 | field galaxy | Im | |
| DDO 187 | 2 | field galaxy | Im | |
| DDO 193 | 32 | SBdm | ||
| Draco dwarf | 8 | Local Group | dSph | |
| Fornax dwarf | 24 | Local Group | dSph | |
| Holmberg II | 7 | NGC 2403 Group | Im | |
| I Zwicky 18 | 3 | field galaxy | BCD | in a galaxy pair |
| IC 10 | 5 | Local Group | Im | post starburst galaxy |
| IC 1613 | 209 | Local Group | Im | |
| IC 342 | 24 | IC 342 Group | Scd | |
| IC 4182 | 28 | Canes Venatici I Group | Sdm | |
| Large Magellanic Cloud | 5122 | Local Group | Im | |
| Leo A | 156 | Local Group | Im | |
| Leo I dwarf | 71 | Local Group | dSph | |
| Leo II dwarf | 4 | Local Group | dSph | |
| NGC 0055 | 143 | Local Group | SBm | |
| NGC 0147 | 7 | Local Group | dE5 | |
| NGC 0185 | 13 | Local Group | dE3 | Seyfert II galaxy |
| NGC 0205 | 7 | Local Group | S0/E5 | |
| NGC 0300 | 146 | Sculptor Group | Sd | |
| NGC 0925 | 0 | NGC 925 Group | SBc | |
| NGC 1015 | 27 | SBa | ||
| NGC 1309 | 0 | Eridanus Group | Sbc | |
| NGC 1313 | 26 | |||
| NGC 1326A | 17 | Fornax Group | SB | interacting pair |
| NGC 1365 | 95 | Fornax Group | SBbc | Seyfert I galaxy |
| NGC 1425 | 29 | Fornax Group | Sb | |
| NGC 1448 | 89 | NGC 1433 Group | SAcd | |
| NGC 1637 | 41 | field galaxy | Sc | |
| NGC 2090 | 34 | field galaxy | Sb | |
| NGC 2366 | 0 | NGC 2403 Group | Im | in a pair of galaxies |
| NGC 2403 | 17 | NGC 2403 | Scd | |
| NGC 2442 | 433 | SAB(s)bcp | LINER type AGN | |
| NGC 247 | 26 | Sculptor Group | Sd | low surface brightness galaxy |
| NGC 2541 | 34 | NGC 2841 Group | Sc | |
| NGC 2841 | 26 | NGC 2841 Group | Sb | |
| NGC 3021 | 68 | Sbc | ||
| NGC 3031 | 160 | M81 Group | Sab | LINER type AGN |
| NGC 3109 | 120 | Local Group | Sm | |
| NGC 3198 | 78 | NGC 3198 Group | Sc | |
| NGC 3319 | 33 | NGC 3198 Group | SBc | |
| NGC 3351 | 49 | Leo Group | SBc | |
| NGC 3368 | 16 | Leo Group | Sab | |
| NGC 3370 | 199 | LGG 219 | Sc | farthest Cepheids up to now |
| NGC 3447 | 126 | LGG 225 | SBdm | merging interacting galaxies |
| NGC 3621 | 69 | field galaxy | Sd | |
| NGC 3627 | 96 | Leo Group | Sb | LINER type AGN |
| NGC 3972 | 78 | LGG 241 | SA(s)bc | in a pair of galaxies |
| NGC 3982 | 72 | Ursa Maior Group | Sb | Seyfert I galaxy |
| NGC 4038 | 32 | LGG 263 | SBm | merging galaxy pair: Antennae galaxies |
| NGC 4258 | 601 | Canes Venatici II Group | Sbp | Seyfert II galaxy, circumnuclear maser ring |
| NGC 4321 | 52 | Virgo Cluster | Sc | starburst galaxy |
| NGC 4395 | 11 | Canes Venatici I Group | Sm | nearest Seyfert I galaxy |
| NGC 4414 | 11 | NGC 4631 Group | Sc | |
| NGC 4424 | 7 | Sa | ||
| NGC 4496A | 95 | Virgo Cluster | SBc | in a pair of galaxies |
| NGC 4527 | 66 | Virgo Cluster | Sb | |
| NGC 4535 | 50 | Virgo Cluster | SBc | brightest galaxy in Virgo Cluster |
| NGC 4536 | 153 | |||
| NGC 4548 | 24 | Virgo Cluster | SBb | LINER type AGN |
| NGC 4571 | 3 | Virgo Cluster | Sc | |
| NGC 4603 | 61 | Centaurus Cluster | Sc | |
| NGC 4639 | 64 | Virgo Cluster | Sb | Seyfert I galaxy |
| NGC 4725 | 20 | Coma II Group | SBb | Seyfert II galaxy |
| NGC 5253 | 17 | M83 Group | Im | Z Cen = HD 118843 |
| NGC 5584 | 212 | Virgo III Cloud | SBc | |
| NGC 5917 | 15 | S | in an interacting galaxy pair | |
| NGC 6822 | 73 | Local Group | Im | polar ring galaxy |
| NGC 7250 | 29 | Irr | ||
| NGC 7331 | 13 | NGC 7331 Group | Sb | LINER type AGN |
| NGC 7793 | 17 | Sculptor Group | Sd | |
| Pegasus dwarf | 39 | Local Group | Im | |
| Phoenix dwarf | 19 | Local Group | Im | |
| Pinwheel | 845 | M101 Group | Scd | in an interacting galaxy pair |
| Sagittarius dwarf | 1 | Local Group | dSph | |
| Sculptor dwarf | 4 | Local Group | dSph | |
| Sextans A | 92 | Local Group | Im | |
| Sextans B | 8 | Local Group | Im | |
| Sextans dwarf | 5 | Local Group | dSph | |
| Small Magellanic Cloud | 5102 | Local Group | I | |
| Southern Pinwheel | 112 | M83 Group | SBc | starburst galaxy |
| Triangulum | 747 | Local Group | Scd | |
| Tucana dwarf | 6 | Local Group | dSph | |
| Ursa Minor dwarf | 6 | Local Group | dSph | |
| Wolf-Lundmark-Merlotte | 61 | Local Group | Im | |
| TOTAL | 19598 |