List of largest galaxies

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).

A Hubble Space Telescope image of the supergiant elliptical galaxy ESO 306-17. Supergiant elliptical galaxies are some of the largest galaxies known.

Overview
The Condor Galaxy is a colossal spiral galaxy disturbed by the smaller IC 4970. It is the largest known spiral galaxy with the isophotal diameter of over 717,000 light-years (220 kiloparsecs).[1]

Galaxies are vast collections of stars, planets, nebulae and other objects that are surrounded by an interstellar medium and held together by gravity. They do not have a definite boundary by nature, and are characterized with gradually decreasing stellar density as a function of increasing distance from its center. Because of this, measuring the sizes of galaxies can often be difficult and have a wide range of results depending on the sensitivity of the detection equipment and the methodology being used. Some galaxies emit more strongly in wavelengths outside the visible spectrum, depending on its stellar population, whose stars may emit more strongly in other wavelengths that are beyond the detection range. It is also important to consider the morphology of the galaxy when attempting to measure its size - an issue that has been raised by the Russian astrophysicist B.A. Vorontsov-Vel'Yaminov in 1961, which considers separate determination methods in measuring the sizes of spiral and elliptical galaxies.[2]

For a full context about how the diameters of galaxies are measured, including the estimation methods stated in this list, see section Galaxy#Physical diameters.

List
This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by adding missing items with reliable sources.

Listed below are galaxies with diameters greater than 500,000 light-years. This list uses the mean cosmological parameters of the Lambda-CDM model based on results from the 2015 Planck collaboration, where H0 = 67.74 km/s/Mpc, ΩΛ = 0.6911, and Ωm = 0.3089.[3] Due to different techniques, each figure listed on the galaxies has varying degrees of confidence in them. The reference to those sizes plus further additional details can be accessed by clicking the link for NED on the right-hand side of the table.

Galaxies with diameters greater than 500,000 light-years
Galaxy name/designation Major axis diameter (in light-years) Minor axis diameter (in light years) Morphology Estimation
method		 Link for object
ESO 383-76 (ESO 383-G 076)[lower-alpha 1] 1,764,000 882,100 cD5; E5; BrClG 90% total B-light NED
ESO 409-25 (ESO 409-G 025)[lower-alpha 1] 1,454,000 901,700 cD4; E4; BrClG 90% total B-light NED
ESO 248-6 (ESO 248-G 006) 1,335,000 641,000 S0?; BrClG 90% total B-light NED
2MASX J14102504+6337103 1,134,000 1,134,000 ~[lower-alpha 2] 2MASS K-band total mag NED
ESO 151-41 (ESO 151-G 041) 1,132,000 453,000 Sc 90% total B-light NED
MCG-04-02-013[lower-alpha 1] 1,115,000 1,115,000 E 27.0 B-mag arcsec−2 NED
Abell 1576 BCG 1,077,000 517,200 cD db 2MASS K-band total mag NED
ESO 306-17 (ESO 306-G 017) 1,070,000 706,100 cD3; E3 90% total B-light NED
ESO 350-15 (ESO 350-G 015) 1,043,000 521,600 cD3; E3 90% total B-light NED
Abell 1146 BCG 1,009,000 767,100 E 2MASS K-band total mag NED
Abell 747 BCG 995,300 437,900 BrClG 2MASS K-band total mag NED
ESO 473-5 (ESO 473-G 005) 944,600 632,900 Sc; BrClG 90% total B-light NED
Abell 1942 BCG 939,200 638,700 BrClG; AGN 2MASS K-band total mag NED
LEDA 1654342 916,400 623,100 BrClG 2MASS K-band total mag NED
Abell 384 BCG 913,900 274,200 ~[lower-alpha 2] 2MASS K-band total mag NED
Abell 697 BCG[lower-alpha 1] 885,200 637,400 BrClG 2MASS K-band total mag NED
Abell 1437B BCG 868,300 538,400 BrClG 2MASS K-band total mag NED
ESO 443-11 (ESO 443-G 011) 866,500 407,300 cD; SAB00 pec; BrClG 27.0 B-mag arcsec−2 NED
4C +41.26 862,300 724,400 BrClG 2MASS K-band total mag NED
Abell 963 BCG 841,200 605,700 BrClG 2MASS K-band total mag NED
ESO 541-13 (ESO 541-G 013) 840,700 655,700 cD; E3 pec 90% total B-light NED
Abell 1602 BCG 822,000 575,400 BrClG 2MASS K-band total mag NED
NGC 623 803,900 611,000 cD; E 27.0 B-mag arcsec−2 NED
PGC 6616 803,800 401,900 E 27.0 B-mag arcsec−2 NED
Abell 1413 BCG[lower-alpha 1] 801,400 256,400 cD; E; BrClG 25.0 r-mag arcsec−2 NED
ESO 291-9 (ESO 291-G 009) 795,100 461,200 cD4; SA0−;BrClG 90% total B-light NED
Abell 1504 BCG 790,200 458,300 BrClG 2MASS K-band total mag NED
LEDA 1816387 782,500 336,500 ~[lower-alpha 2] 2MASS K-band total mag NED
Abell 812 BCG[lower-alpha 1] 772,900 541,000 BrClG 2MASS K-band total mag NED
7C 1043+5953 771,000 400,900 BrClG 2MASS K-band total mag NED
Abell 1785B BCG 769,800 508,100 BrClG 2MASS K-band total mag NED
LEDA 2463193 769,500 769,500 BrClG 2MASS K-band total mag NED
Abell 781 b 766,500 337,300 BrClG 25.0 r-mag arcsec−2 NED
Abell 655 BCG 760,000 577,600 BrClG 2MASS K-band total mag NED
NGC 4038[lower-alpha 3][lower-alpha 1] 752,000 541,400 SB(s)m pec 27.0 B-mag arcsec−2 NED
Abell 908 BCG 750,200 555,100 BrClG 2MASS K-band total mag NED
Abell 2061 b[lower-alpha 1] 747,700 583,200 BrClG 2MASS K-band total mag NED
ESO 198-1 (ESO 198-G 001) 741,600 563,600 cD4; E4 27.0 B-mag arcsec−2 NED
3C 295 738,000 738,000 E/S0;LEG;BrClG NLRG 2MASS K-band total mag NED
Abell 267 BCG 736,700 302,000 BrClG 25.0 r-mag arcsec−2 NED
Abell 1758N BCG 731,500 321,900 BrClG 2MASS K-band total mag NED
Abell 360 BCG 727,700 363,900 cD 2MASS K-band total mag NED
ESO 251-21 (ESO 251-G 021) 727,700 458,400 SAB0- pec; E/S0 90% total B-light NED
Abell 1807 BCG 720,200 475,300 cD 2MASS K-band total mag NED
NGC 6872 717,000 143,400 SAB(rs)c 25.5 r-mag arcsec−2 NED
Abell 2125 BCG 715,200 515,200 E[lower-alpha 4] 2MASS K-band total mag NED
B3 1715+425 715,200 472,000 BrClG; AGN[lower-alpha 5] 2MASS K-band total mag NED
Abell 2219 BCG 713,400 385,300 BrClG 2MASS K-band total mag NED
ESO 552-20 (ESO 552-G 020)[lower-alpha 1] 710,000 411,800 cD; E 90% total B-light NED
ESO 11-4 (ESO 011-G 004) 707,400 488,100 cD4; E4 pec 90% total B-light NED
IC 1633[lower-alpha 1] 705,700 543,400 cD; E1 27.0 B-mag arcsec−2 NED
LEDA 2262657 704,000 521,000 BrClG 2MASS K-band total mag NED
NGC 1759 702,800 632,500 cD; E 27.0 B-mag arcsec−2 NED
LEDA 1869814 702,100 463,300 BrClG 2MASS K-band total mag NED
Abell 242 BCG 699,900 287,000 cD; db 2MASS K-band total mag NED
Abell 1553 BCG 696,700 236,900 BrClG 25.0 r-mag arcsec−2 NED
Abell 2175 BCG[lower-alpha 1] 693,600 416,100 cD; BrClG 2MASS K-band total mag NED
Abell 1633 BCG B 691,700 421,900 cD 2MASS K-band total mag NED
IC 4329[lower-alpha 1] 689,900 386,300 SAB(s)0-;cD; Sy1 90% total B-light NED
Abell 2244 BCG 687,200 577,300 BrClG 2MASS K-band total mag NED
OGC 596 684,700 287,600 ~[lower-alpha 2] 2MASS K-band total mag NED
2MASS J14342214-0232472 676,600 399,200 BrClG 2MASS K-band total mag NED
ESO 444-46 (ESO 444-G 046)[lower-alpha 1] 670,700 382,300 cD4; E4; BrClG 27.0 B-mag arcsec−2 NED
LEDA 2388764 668,900 481,600 BrClG 2MASS K-band total mag NED
Abell 227 BCG 667,400 493,900 cD 2MASS K-band total mag NED
ESO 351-21 (ESO 351-G 021) 664,600 584,900 SA0- 90% total B-light NED
NGC 1668 660,100 435,700 SA0−; D/cD 90% total B-light NED
Abell 980 BCG 658,500 342,400 BrClG 2MASS K-band total mag NED
2MASX J06583806-5557256 658,300 408,200 ~[lower-alpha 2] 2MASS K-band total mag NED
ESO 253-27 (ESO 253-G 027)[lower-alpha 1] 658,200 447,600 cD3; E3 90% total B-light NED
Abell 38 BCG 658,200 368,600 BrClG 2MASS K-band total mag NED
LEDA 1127620 657,400 552,200 ~[lower-alpha 2] 2MASS K-band total mag NED
MACS J0257.6-2209 BCG 656,200 446,200 BrClG 2MASS K-band total mag NED
LEDA 1694905 656,100 472,400 BrClG 2MASS K-band total mag NED
LEDA 1769306 655,800 524,700 BrClG 2MASS K-band total mag NED
ESO 488-27 (ESO 488-G 027)[lower-alpha 1] 654,300 536,500 cD; E1 27.0 B-mag arcsec−2 NED
Abell 635 BCG 652,900 470,100 cD 2MASS K-band total mag NED
Abell 209 BCG 652,500 365,400 BrClG 2MASS K-band total mag NED
LEDA 1835765 652,100 260,900 ~[lower-alpha 2] 2MASS K-band total mag NED
Abell 2228 BCM[lower-alpha 1] 650,600 495,700 BrClG; cD 2MASS K-band total mag NED
Abell 690 BCG[lower-alpha 1] 647,800 492,300 cD; BrClG; WLRG 2MASS K-band total mag NED
IC 5353[lower-alpha 1] 647,600 524,600 cD; S0− 26.0 B-mag arcsec−2 NED
LEDA 2637071 643,000 347,200 ~[lower-alpha 2] 2MASS K-band total mag NED
ESO 488-15 (ESO 488-G 015)[lower-alpha 1] 642,900 501,500 E 90% total B-light NED
Abell 1925 BCG 642,900 424,300 BrClG; AGN 2MASS K-band total mag NED
ESO 349-10 (ESO 349-G 010) 642,200 398,200 cD4; E4; BrClG 90% total B-light NED
Abell 1548 BCG[lower-alpha 1] 640,200 563,400 BrClG 2MASS K-band total mag NED
Abell 2025 BCG 637,500 522,800 D/cD 2MASS K-band total mag NED
Abell 1835 BCG[lower-alpha 4][lower-alpha 1] 637,100 471,500 cD; BrClG 2MASS K-band total mag NED
Abell 1277 BCG 636,800 471,200 BrClG 2MASS K-band total mag NED
Abell 1864A BCG[lower-alpha 1] 634,800 400,300 cD; BrClG 2MASS K-band total mag NED
LEDA 1933247 634,600 342,700 BrClG 2MASS K-band total mag NED
Abell 122 BCG 633,800 557,800 cD; E 2MASS K-band total mag NED
UGC 2438[lower-alpha 1] 633,100 367,200 cD 2MASS K-band total mag NED
LEDA 2628046 632,800 379,700 BrClG 2MASS K-band total mag NED
Abell 2111 BCG[lower-alpha 1] 627,300 414,100 E; BrClG 2MASS K-band total mag NED
MCG +05-33-033[lower-alpha 1] 627,200 489,200 cD; BrClG 2MASS K-band total mag NED
Abell 1650 BCG 626,100 231,600 cD; BrClG 25.0 r-mag arcsec−2 NED
OGC 79 623,700 324,300 BrClG 2MASS K-band total mag NED
LEDA 2197890 619,900 520,700 BrClG 2MASS K-band total mag NED
Abell 907 BCG 618,700 457,800 BrClG 2MASS K-band total mag NED
Abell 523-178 618,100 445,000 ~[lower-alpha 2] 2MASS K-band total mag NED
PGC 58708 617,300 543,200 ~[lower-alpha 2] 2MASS K-band total mag NED
LEDA 1183804 616,500 468,600 ~[lower-alpha 2] 2MASS K-band total mag NED
SDSSCGB 01756.01 613,400 282,200 BrClG 2MASS K-band total mag NED
Abell 2187 BCG[lower-alpha 1] 613,400 245,300 BrClG 25.0 r-mag arcsec−2 NED
ESO 539-11 (ESO 539-G 011) 613,300 361,800 S0 90% total B-light NED
Abell 2034 BCG 612,200 238,700 BrClG 25.0 r-mag arcsec−2 NED
LEDA 140200[lower-alpha 1] 610,700 415,500 BrClG 2MASS K-band total mag NED
Abell 123 BCG 610,400 415,100 D/cD 2MASS K-band total mag NED
ESO 33-3 (ESO 033-G 003) 607,800 370,800 E4 90% total B-light NED
Abell 1068 BCG 607,400 243,000 cD; Sy2 25.0 r-mag arcsec−2 NED
ESO 307-13 (ESO 307-G 013) 607,400 406,900 cD3; E3; BrClG 90% total B-light NED
Abell 586 BCG[lower-alpha 1] 606,700 351,900 E; BrClG 2MASS K-band total mag NED
ESO 482-21 (ESO 482-G 021) 604,400 344,500 S0 90% total B-light NED
Abell 1047 G1[lower-alpha 1] 602,600 518,300 BrClG 2MASS K-band total mag NED
ESO 86-62 (ESO 086-G 062) 602,300 373,400 cD4; E4 90% total B-light NED
WISEA J005939.38-181807.5 602,100 457,600 SB(s)a pec 2MASS K-band total mag NED
WISEA J085404.52+290312.7[lower-alpha 1] 601,600 433,200 S0; BrClG 2MASS K-band total mag NED
MCG+10-19-068 601,500 445,100 BrClG 2MASS K-band total mag NED
Abell 315-5200[lower-alpha 1] 600,800 324,400 BrClG 2MASS K-band total mag NED
Abell 140 BCG 600,400 408,200 cD 2MASS K-band total mag NED
Abell 2218 G1 600,200 126,000 cD; E 2MASS K-band total mag NED
Abell 3880 BCG 597,800 143,500 cD3; E3; BrClG 25.0 B-mag arcsec−2 NED
Abell 1918B BCG 596,500 334,000 BrClG 2MASS K-band total mag NED
Abell 370 BCG[lower-alpha 1] 595,700 595,700 E; BrClG 2MASS K-band total mag NED
2MASX J03032123+0155344 595,600 345,500 cD 2MASS K-band total mag NED
Abell 971 BCG 595,400 404,900 cD; BrClG 2MASS K-band total mag NED
ESO 488-13 (ESO 488-G 013)[lower-alpha 1] 595,300 375,000 SA(r)0+ 27.0 B-mag arcsec−2 NED
LEDA 1369756 592,500 391,100 BrClG 2MASS K-band total mag NED
Abell 1132 BCG[lower-alpha 1] 592,500 509,500 BrClG 2MASS K-band total mag NED
IC 5358[lower-alpha 1] 592,000 272,300 cD4; E4 pec 27.0 B-mag arcsec−2 NED
Abell 2009 BCG 591,800 284,100 BrClG 2MASS K-band total mag NED
Abell 1045 BCG[lower-alpha 1] 590,900 307,200 BrClG 2MASS K-band total mag NED
Abell 1587 BCG 590,900 248,200 BrClG; Sy1 2MASS K-band total mag NED
Abell 2082-01[lower-alpha 1] 590,200 460,400 E; BrClG; AGN 2MASS K-band total mag NED
Abell 705 BCG 590,200 507,600 BrClG 2MASS K-band total mag NED
Abell 1027B BCG 590,000 413,000 BrClG 2MASS K-band total mag NED
Abell 1911A BCG[lower-alpha 1] 589,000 388,800 BrClG 2MASS K-band total mag NED
Abell 1808A BCG[lower-alpha 1] 588,700 376,800 cD; BrClG; AGN 2MASS K-band total mag NED
Abell 2187 BCG[lower-alpha 1] 589,400 405,000 BrClG 25.0 r-mag arcsec−2 NED
Abell S78 BCG 589,000 524,200 S0 90% total B-light NED
LEDA 1818176[lower-alpha 1] 587,800 470,200 BrClG 2MASS K-band total mag NED
Abell 1964 North 578,700 277,800 ~[lower-alpha 2] 2MASS K-band total mag NED
Abell 2236 BCM 578,600 381,900 cD; m 2MASS K-band total mag NED
PGC 41687 576,300 461,000 BrClG 2MASS K-band total mag NED
Abell 359 BCG 575,900 299,500 cD 2MASS K-band total mag NED
ESO 146-28 (ESO 146-G 028) 574,800 396,600 cD3; E3 27.0 B-mag arcsec−2 NED
LEDA 2669504 582,900 239,000 BrClG 25.0 r-mag arcsec−2 NED
ESO 161-8 (ESO 161-G 008) 574,000 287,000 cD5; E5; BrClG 90% total B-light NED
Abell 2292 BCG 569,500 398,700 cD 2MASS K-band total mag NED
OGC 58 565,700 294,200 BrClG 25.0 r-mag arcsec−2 NED
LEDA 139714 561,500 185,300 BrClG 25.0 r-mag arcsec−2 NED
LEDA 2003262 561,300 437,800 BrClG 2MASS K-band total mag NED
ESO 306-4 (ESO 306-G 004) 560,300 280,100 cD4; E4 pec 90% total B-light NED
MCG +10-19-096[lower-alpha 1] 560,200 425,800 cD; BrClG 2MASS K-band total mag NED
Abell 521 BCG 560,100 291,300 Early-type[lower-alpha 6] 2MASS K-band total mag NED
Tadpole Galaxy 558,400 111,700 SB(s)c pec 25.0 B-mag arcsec−2 NED
Abell 2345 BCG 558,200 357,200 cD 2MASS K-band total mag NED
Abell 1246 G1 557,900 234,300 BrClG 2MASS K-band total mag NED
Abell 223B BCG 556,500 556,500 BrClG 2MASS K-band total mag NED
Abell 1633 BCG A 556,300 255,900 cD 2MASS K-band total mag NED
MCG +05-34-070 555,800 400,200 ~[lower-alpha 2] 2MASS K-band total mag NED
IC 1101[lower-alpha 1] 553,200 449,700 cD; S0- 2MASS K-band total mag NED
ESO 424-1 (ESO 424-G 001) 551,500 402,600 cD4; E4 pec 90% total B-light NED
2MASX J09420304+0857189 550,500 192,700 ~[lower-alpha 7] 2MASS K-band total mag NED
LEDA 1149787 549,000 384,300 BrClG 2MASS K-band total mag NED
Abell 1837 BCG[lower-alpha 1] 548,400 383,900 cD 2MASS K-band total mag NED
Abell 394 BCG 548,100 350,800 cD 2MASS K-band total mag NED
Abell 279A BCG[lower-alpha 1] 547,600 427,200 BrClG 2MASS K-band total mag NED
2MASX J15123776+3451351 547,400 383,200 BrClG 2MASS K-band total mag NED
WISEA J222418.56-551451.7 546,500 393,500 cD3; E3 2MASS K-band total mag NED
Abell 1583 G1 545,400 272,700 cD 2MASS K-band total mag NED
Abell S968A BCG 545,300 196,300 cD5; E5 pec 25.0 B-mag arcsec−2 NED
LEDA 1483121[lower-alpha 1] 545,200 327,100 BrClG 2MASS K-band total mag NED
UGC 8738[lower-alpha 1] 544,900 305,200 S0-?; BrClG; BL Lac 2MASS K-band total mag NED
ESO 349-1 (ESO 349-G 001) 544,900 403,200 cD1; E1 27.0 B-mag arcsec−2 NED
Abell 2261 BCG[lower-alpha 1] 544,600 533,800 cD; E 2MASS K-band total mag NED
ESO 118-6 (ESO 118-IG 006)[lower-alpha 1] 544,400 310,300 cD4; E4 26.0 B-mag arcsec−2 NED
LEDA 2097228 543,600 424,000 cD 2MASS K-band total mag NED
NGC 77 543,400 527,100 SA0- 90% total B-light NED
Abell 329 BCG 542,400 314,600 cD 2MASS K-band total mag NED
Abell 750 G1 541,300 281,500 BrClG 2MASS K-band total mag NED
NGC 7012 541,100 330,100 cD4; E4 pec 90% total B-light NED
Abell 415 BCG 540,600 508,200 S0 2MASS K-band total mag NED
Abell 773 D2[lower-alpha 1] 540,300 398,600 cD; BrClG 2MASS K-band total mag NED
B2 1003+26[lower-alpha 1] 539,800 431,900 E; BrClG 2MASS K-band total mag NED
LEDA 2155337 539,700 367,000 BrClG 2MASS K-band total mag NED
Abell 983-4822[lower-alpha 1] 539,600 453,300 BrClG 2MASS K-band total mag NED
2MASX J16573834+7703462 539,500 248,100 ~[lower-alpha 2] 2MASS K-band total mag NED
LEDA 1860126 536,300 504,100 E; BrClG 25.0 r-mag arcsec−2 NED
LEDA 2623325 531,200 302,800 ~[lower-alpha 2] 2MASS K-band total mag NED
2MASX J11591490+4947480 529,100 291,000 BrClG 25.0 r-mag arcsec−2 NED
Abell 1795 BCG[lower-alpha 1] 529,100 465,600 cD; S0?; LINER; Sy3 2MASS K-band total mag NED
B2 1527+30[lower-alpha 1] 528,300 359,300 E 2MASS K-band total mag NED
Abell 1232 BCG[lower-alpha 1] 527,500 411,400 BrClG 2MASS K-band total mag NED
IC 4252[lower-alpha 1] 526,700 331,800 SA(rs)0-: ;BrClG 27.0 B-mag arcsec−2 NED
Abell 1382 BCG[lower-alpha 1] 525,000 346,500 BrClG 2MASS K-band total mag NED
Abell 1165 BCG 524,000 324,900 cD 2MASS K-band total mag NED
2MASX J13260058+1222439 523,700 366,600 ~[lower-alpha 2] 2MASS K-band total mag NED
Abell 2294 BCG 523,100 439,400 cD 2MASS K-band total mag NED
LEDA 1166681 520,900 328,200 BrClG 2MASS K-band total mag NED
Abell 1654 BCG 520,700 427,000 BrClG; cD 2MASS K-band total mag NED
OGC 81 520,000 265,200 BrClG 25.0 r-mag arcsec−2 NED
Abell 208A BCG[lower-alpha 1] 519,600 426,100 E; BrClG, AGN 2MASS K-band total mag NED
Abell 715 BCG 515,400 484,400 BrClG 2MASS K-band total mag NED
LEDA 184952[lower-alpha 1] 512,400 389,400 BrClG 2MASS K-band total mag NED
Abell 1988A BCG[lower-alpha 1] 512,300 358,600 BrClG 2MASS K-band total mag NED
LEDA 97407 511,000 367,900 BrClG; AGN 2MASS K-band total mag NED
LEDA 3273302 509,800 331,400 BrClG 2MASS K-band total mag NED
LEDA 1013135 509,300 325,900 BrClG 2MASS K-band total mag NED
UGC 9589 505,800 126,500 SB Intermed. surface brightness NED
LEDA 1374261 505,200 262,700 BrClG 25.0 r-mag arcsec−2 NED
Abell 1920 BCG 505,100 353,600 BrClG 2MASS K-band total mag NED
LEDA 1267717[lower-alpha 1] 504,000 352,800 ~[lower-alpha 2] 2MASS K-band total mag NED
UGC 10012[lower-alpha 1] 503,000 392,400 cD; E; BrClG 2MASS K-band total mag NED
Abell 1351 BCG 502,400 445,000 BrClG 2MASS K-band total mag NED
Abell 667 BCG 502,400 341,600 BrClG 2MASS K-band total mag NED

Listed below are some notable galaxies under 500,000 light-years in diameter, for the purpose of comparison. All links to NED are available, except for the Milky Way, which is linked to the relevant paper detailing its size.

Notable galaxies with diameters 500kly or less
Galaxy name/designation Major axis diameter (in light-years) Minor axis diameter (in light years) Morphology Estimation
method		 Link for object
Hercules A 459,800 285,100 E; WLRG; NLRG 2MASS K-band total mag NED
UGC 2885 (Rubin's Galaxy)[lower-alpha 1] 438,100 201,500 SA(rs)c 25.0 B-mag arcsec−2 NED
NGC 1399[lower-alpha 1] 412,300 379,300 cD; E1 pec 90% total B-light NED
NeVe 1 332,100 239,100 cD; E 2MASS K-band total mag NED
Alcyoneus (galaxy) 242,900[lower-alpha 8] 155,400 E 25.0 r-mag arcsec−2 NED
Andromeda Galaxy 152,300 152,300 SA(s)b 25.0 mag/arcsec2 NED
Messier 87[lower-alpha 1] 118,800[lower-alpha 9] 93,870 cD; E0-E1 pec; NLRG; Sy 25.0 B-mag arcsec−2 NED
Malin 1 118,700[lower-alpha 10] 118,700 S; LSB 2MASS K-band total mag NED
NGC 262[lower-alpha 1] 101,100 78,860 SA(s)0/a; Sy2 2MASS K-band total mag NED
Milky Way 87,400 ± 3,590 87,400 ± 3,590 Sb; Sbc; SB(rs)bc 25.0 B-mag arcsec−2 [4][5]

See also

Notes
  1. The physical diameters given by NED for this object are based on the mean of one or more redshift-independent distance techniques, which are subject to errors and sensitivity to extreme values. The diameters given for this object in this list was based on NED's provided scale "Virgo + GA + Shapley" multiplied with the values for the angular diameter of the cited estimation method.
  2. Morphology unlisted; images show an elliptical galaxy.
  3. The larger galaxy in the Antennae Galaxies pair.
  4. Starburst galaxy
  5. A blazar.
  6. This classification does not mean an earlier age or stage of evolution of a galaxy. "Early-type" in this case refers to its position in the Hubble tuning fork (where E and S0 galaxies are early-type) due to the erroneous interpretation that elliptical galaxies evolve into spiral galaxies. The term has stuck ever since.
  7. Morphology unlisted; irresolvable in available images
  8. Major axis refers to the visible stellar axis of the host galaxy. Radio lobes are 15 million light-years across, though not considered a part of the main galaxy.
  9. This is the diameter as measured through the 25.0 mag/arcsec−2 isophote at the B-band. The diffuse stellar halo of this galaxy extends up to 300 kiloparsecs (980,000 light-years) across.
  10. This is the diameter measured through the quoted estimation method. This galaxy has an immense, diffuse low-surface brightness spiral extending up to 200 kiloparsecs (650,000 light-years) across.

References
  1. "Your NED Search Results". ned.ipac.caltech.edu.
  2. Vorontsov-Vel'Yaminov, B. A. (1961). "The Comparison of Galaxy Diameters". Soviet Astronomy. 4: 735. Bibcode:1961SvA.....4..735V.
  3. Ade, P. A. R.; et al. (2016). "Planck2015 results". Astronomy & Astrophysics. 594: A13. arXiv:1502.01589. Bibcode:2016A&A...594A..13P. doi:10.1051/0004-6361/201525830. S2CID 119262962.
  4. Goodwin, S. P.; Gribbin, J.; Hendry, M. A. (22 April 1997). "The Milky Way is just an average spiral". arXiv:astro-ph/9704216.
  5. Goodwin, S. P.; Gribbin, J.; Hendry, M. A. (August 1998). "The relative size of the Milky Way". The Observatory. 118: 201–208. Bibcode:1998Obs...118..201G.

Further reading
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