KIC 11145123
Slow rotating Blue Straggler
KIC 11145123 (sometimes mistakenly called Kepler 11145123), is a white hued star located in the northern constellation Cygnus, the swan. It has an apparent magnitude of 13.12, making it readily visible in large telescopes, but not to the naked eye. The object is located relatively far at a distance of approximately 3,910 light years, but is rapidly approaching the Solar System with a radial velocity of −136 km/s.
Characteristics
KIC 11145123 has a spectral classification of F7V, indicating that it is a main sequence F-type star. Atmospheric models suggest it may be hotter and possibly a late A-type star. It has 1.4 times the mass of the Sun, in contrast to the 1.7 times that would be expected from a normal late A main sequence star, and 1.57 times its radius. It radiates 12 times the luminosity of the Sun from its photosphere at an effective temperature of 7,590 K. Unlike most hot stars, KIC 11145123 spins exceptionally slowly with a projected rotational velocity of 1 km/s. This corresponds to a period of roughly 100 days. Despite appearing as a main sequence star (Gaia DR3 models it as such), it is most likely a blue straggler.
Roundest natural object
KIC 11145123 is currently believed be the roundest natural object, with the difference between equatorial and polar radii equaling a mere three kilometers.
Begin with the source’s own compact description: “KIC 11145123” is slow rotating Blue Straggler. The dossier treats that line as a proposition to test through Slow, rotating and Blue, not as a finished interpretation.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Sep 12, 2026. The linked authority identifier is Q28110259. None of the 0 selected statements returned an explicit reference.
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This entry incorporates text from “KIC 11145123” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.