56 Ursae Majoris Explained

56 Ursae Majoris (56 UMa) is a star in the constellation Ursa Major. Its apparent magnitude is 5.03. It is a single-lined spectroscopic binary with an orbital period of about 45 years. The companion star is likely a heavy neutron star born by a supernova that exploded around 100,000 years ago.^[1]

Notes and References

1. 2301.06531 . A neutron star candidate in the long-period binary 56 UMa. 2023A&A...670L..14E . Escorza . A. . Karinkuzhi . D. . Jorissen . A. . Van Eck . S. . Schmelz . J. T. . Verschuur . G. L. . Boffin . H. M. J. . De Rosa . R. J. . Van Winckel . H. . Astronomy and Astrophysics . 2023 . 670 . L14 . 10.1051/0004-6361/202245796 . 255941814 .