List of smallest galaxies

Below is a list of the smallest known galaxies ordered by their diameters. Every galaxy on this list is below 20,000 light-years and they are sorted in sorted in ascending order.

List

List of smallest known galaxies
Name Diameter (light-years) Notes
Ursa Major III 9.6[1] Could be a star cluster instead of a galaxy.
M85-HCC1 12.06 ± 5.87[2] Could be a star cluster instead of a galaxy.
M60-UCD1 158 ± 3.26[3] Potential smallest known non-disputed galaxy.
Andromeda XVIII 650 ± 48[4]
Ursa Minor Dwarf 2739.7[5]
GN-z11 4,000 ± 2,000[6]
UGC 11411 ~5,600[7]
UGC 6541 ~5,700[8]
Messier 32 8,000[9]
Sextans A ~8,000[10]
NGC 4118 ~8,100[11]
Sextans B ~8,900[12]
NGC 6822 ~9,200[13]
Messier 110 17,050[14]
Small Magellanic Cloud 18,900[15]

References

  1. ^ Devlin, Scot; Baumgardt, Holger; Sweet, Sarah M. (2025-05-01), "Reevaluating UMa3/U1: star cluster or the smallest known galaxy?", Monthly Notices of the Royal Astronomical Society, 539 (3): 2485, arXiv:2504.21301, Bibcode:2025MNRAS.539.2485D, doi:10.1093/mnras/staf572, retrieved 2025-12-14
  2. ^ Michael A. Sandoval; Richard P. Vo; Aaron J. Romanowsky (2015). "Hiding in plain sight: record-breaking compact stellar systems in the Sloan Digital Sky Survey". Astrophysical Journal Letters. 808 (1): L32. arXiv:1506.08828. Bibcode:2015ApJ...808L..32S. doi:10.1088/2041-8205/808/1/l32. S2CID 55254708.
  3. ^ Strader, Jay; Seth, Anil; Forbes, Duncan; Fabbiano, Giuseppina; Romanowsky, Aaron; Brodie, Jean; Conroy, Charlie; Caldwell, Nelson; Pota, Vincenzo (2013-08-14), "The Densest Galaxy", The Astrophysical Journal, 775 (1): L6, arXiv:1307.7707, Bibcode:2013ApJ...775L...6S, doi:10.1088/2041-8205/775/1/L6
  4. ^ Collins, Michelle L. M.; Chapman, Scott C.; Rich, R. Michael; Ibata, Rodrigo A.; Martin, Nicolas F.; Irwin, Michael J.; Bate, Nicholas F.; Lewis, Geraint F.; Peñarrubia, Jorge (2013-02-26), "A Kinematic Study of the Andromeda Dwarf Spheroidal System", The Astrophysical Journal, 768 (2): 172, arXiv:1302.6590, Bibcode:2013ApJ...768..172C, doi:10.1088/0004-637X/768/2/172
  5. ^ "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2026-03-14.
  6. ^ Oesch, P. A.; Brammer, G.; Dokkum, P. G. van; Illingworth, G. D.; Bouwens, R. J.; Labbe, I.; Franx, M.; Momcheva, I.; Ashby, M. L. N. (2016-03-01), "A Remarkably Luminous Galaxy at Z = 11.1 Measured with Hubble Space Telescope Grism Spectroscopy", The Astrophysical Journal, 819 (2): 129, arXiv:1603.00461, Bibcode:2016ApJ...819..129O, doi:10.3847/0004-637X/819/2/129, retrieved 2025-12-14
  7. ^ "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2025-12-14.
  8. ^ "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2025-12-14.
  9. ^ "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2025-12-14.
  10. ^ "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2025-12-14.
  11. ^ "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2025-12-14.
  12. ^ "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2025-12-14.
  13. ^ "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2025-12-14.
  14. ^ "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2025-12-14.
  15. ^ "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2025-12-14.
This article is issued from Wikipedia. The text is available under Creative Commons Attribution-Share Alike 4.0 unless otherwise noted. Additional terms may apply for the media files.