HD 7449
star in the constellation Cetus
HD 7449 is a binary star system about 126 light-years way. The primary star, HD 7449 A, is a main-sequence star belonging to the spectral class F9.5. It is younger than the Sun. The primary star is slightly depleted of heavy elements, having 80% of solar abundance.
Companion
The stellar companion HD 7449 B, belonging to spectral class M4.5, was discovered in 2015. A survey in 2017 has failed to find additional stars with masses above 0.35M☉ in the system.
The most recent parameters for HD 7449 B as of 2022 come from a combination of data from radial velocity, astrometry, and imaging, showing that it is about 178 MJ (0.17 M☉), and orbiting with a semi-major axis of about 34.7 AU and an orbital period of about 175 years.
Planetary system
In 2011 one super-Jupiter-mass planet, HD 7449 Ab on a very eccentric orbit around HD 7449 A was discovered utilising the radial velocity method. A second, long-term radial velocity trend is present, and a second planet or brown dwarf has been proposed as the cause of this trend. However, in 2015 a low-mass stellar companion (HD 7449 B) was found, which is likely the cause of the long-term trend.
Begin with the source’s own compact description: “HD 7449” is star in the constellation Cetus. The dossier treats that line as a proposition to test through star, constellation and Cetus, not as a finished interpretation.
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Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Aug 23, 2026. The linked authority identifier is Q4039948. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2015, 2017, 2022 and 2011.
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This entry incorporates text from “HD 7449” 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.