NGC 5957 is aspiral galaxy located in the constellationSerpens. It lies at a distance of about 100 millionlight years from Earth based on redshift-independent methods, which, given its apparent dimensions, means that NGC 5957 is about 75,000 light years across.[1] It was discovered byHeinrich d'Arrest on April 29, 1865.[3]
NGC 5957 has abar which is 0.96 arcminutes across. At the end of the bar lies an innerring with a diameter of 0.94 arcminutes.[4] From the ring emerge multiple spiral arms[5] which form an outer ring with a diameter of 2.38 arcminutes.[4] The nucleus of the galaxy has been found to beactive and has been identified as aLINER. The nucleus emitsH-alpha that can't be resolved.[6]
One supernova has been discovered in NGC 5957, SN 2025fvw. It was discovered byKōichi Itagaki on 26 March 2025 at an apparent magnitude of 17.4. It was identified as aType Ia supernova.[7]
^Seligman, Courtney."NGC 5957".Celestial Atlas. Retrieved19 November 2018.
^abComerón, S.; Salo, H.; Laurikainen, E.; Knapen, J. H.; Buta, R. J.; Herrera-Endoqui, M.; Laine, J.; Holwerda, B. W.; Sheth, K.; Regan, M. W.; Hinz, J. L.; Muñoz-Mateos, J. C.; Gil de Paz, A.; Menéndez-Delmestre, K.; Seibert, M.; Mizusawa, T.; Kim, T.; Erroz-Ferrer, S.; Gadotti, D. A.; Athanassoula, E.; Bosma, A.; Ho, L. C. (February 2014). "ARRAKIS: atlas of resonance rings as known in the S 4 G".Astronomy & Astrophysics.562: A121.arXiv:1312.0866.Bibcode:2014A&A...562A.121C.doi:10.1051/0004-6361/201321633.
