HD 28109

Autor(i): Karistus

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HD 28109, aka TOI-282, is an F-type main sequence star located about 455.13 lightyears from the solar system. The star is accompanied by two sub-Neptunes and a low density Neptune sized planet, HD 28109 c and HD 28109 d are near a 3:2 MMR. HD 28109 b was one hypothesized to be rocky but future studies significantly reduced the planets measured mass as well as bumped up its observed size, putting on par with other sub-Neptunes.

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