HN Pegasi
star in the constellation Pegasus
HN Pegasi is the variable star designation for a young, Sun-like star in the northern constellation of Pegasus. It has an apparent visual magnitude of 5.9, which, according to the Bortle scale, indicates that it is visible to the naked eye from suburban skies. Parallax measurements put the star at a distance of around 59 light years from the Sun, but it is drifting closer with a radial velocity of −16.7 km/s.
This is a G-type main sequence star with a stellar classification of G0 V CH–0.5 and an estimated age of just 237 million years. It has slightly more mass and a slightly larger radius than the Sun, but a somewhat lower metallicity. It is spinning relatively quickly, with an estimated rotation period of 4.84 days.
The surface magnetic field of the star has a complex and variable geometry. It is a BY Draconis variable star with an active chromosphere, which means there is a rotational modulation of its luminosity due to star spots. Much like the Sun, the star spot activity undergoes a periodic cycle of maxima and minima lasting roughly 5.5±0.3 yr. Its apparent magnitude varies between a maximum of 5.92 and a minimum of 5.95 over a period of 24.9 days.
The public source identifies “HN Pegasi” as star in the constellation Pegasus. This brief keeps that definition visible, then builds a research path around Pegasi, star and constellation.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Sep 16, 2026. The linked authority identifier is Q78607267. None of the 0 selected statements returned an explicit reference.
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This entry incorporates text from “HN Pegasi” 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.