Talk:List of largest galaxies/HyperLEDA version
This is a list of largest galaxies known, sorted by order of increasing major axis diameters. The unit of measurement used is the light-year (approximately 9.46×1012 kilometers).
List
[edit]Listed below are galaxies with diameters greater than 700,000 light-years. This list uses the mean cosmological parameters of the Lambda-CDM model based on results from the 2018 Planck collaboration, where H0 = 67.4 km/s/Mpc, ΩΛ = 0.6847, and Ωm = 0.315.[1] Due to different techniques, each figure listed on the galaxies has varying degrees of confidence in them. Only the maximum diameters are listed belowm The reference to those sizes plus further additional details and estimates can be accessed by clicking the link for the Lyon-Meudon Extragalactic Database on the right-hand side of the table.
| Galaxy name/designation | Major axis diameter | Minor axis diameter | Morphology | Estimation method | Link for object |
|---|---|---|---|---|---|
| PGC 93944 | 267.91 kpc (874,000 ly) | 105.19 kpc (343,000 ly) | E | 25.0 mag/arcsec2 z-band | HyperLEDA |
| PGC 1931666 | 248.27 kpc (810,000 ly) | 111.15 kpc (363,000 ly) | E | 25.0 mag/arcsec2 z-band | HyperLEDA |
| PGC 2362940 | 187.53 kpc (612,000 ly) | 104.49 kpc (341,000 ly) | E | 25.0 mag/arcsec2 i-band | HyperLEDA |
| PGC 1869834 | 159.14 kpc (519,000 ly) | 109.09 kpc (356,000 ly) | E | 25.0 mag/arcsec2 i-band | HyperLEDA |
| PGC 2344785 | 152.56 kpc (498,000 ly) | 110.33 kpc (360,000 ly) | E | 25.0 mag/arcsec2 z-band | HyperLEDA |
| SDSSCGA 00056.01 | 140.58 kpc (459,000 ly) | 90.77 kpc (296,000 ly) | E | 25.0 mag/arcsec2 z-band | HyperLEDA |
| Abell 655-3 | 122.71 kpc (400,000 ly) | 84.90 kpc (277,000 ly) | SBc | 25.0 mag/arcsec2 z-band | HyperLEDA |
| PGC 97478 | 117.60 kpc (384,000 ly) | 103.84 kpc (339,000 ly) | E | 25.0 mag/arcsec2 z-band | HyperLEDA |
| Abell 1437 BCG | 100.81 kpc (329,000 ly) | 64.49 kpc (210,000 ly) | E | 25.0 mag/arcsec2 B-band | HyperLEDA |
- ^ Planck Collaboration (2020). "Planck 2018 results. VI. Cosmological parameters". Astronomy & Astrophysics. 641. page A6 (see PDF page 15, Table 2: "Age/Gyr", last column). arXiv:1807.06209. Bibcode:2020A&A...641A...6P. doi:10.1051/0004-6361/201833910. S2CID 119335614.