GJ 1128
dwarf star
GJ 1128 is a star in the constellation Carina. It is somewhat nearby, located about 21.212 light-years away from Earth.
GJ 1128 is a red dwarf star with a mere 0.43% of the solar luminosity, and an estimated mass 17.5% of the mass of the Sun. It has 19% of the solar radius and its effective temperature is around 3,100 K, values comparable to the Barnard's Star. It is a long-term variable with the prominent 5-year starspot cycle comparable to that of Sun's.
The discovery designation of GJ 1128 is L 100-115, from a 1944 catalogue of high-proper-motion stars. It was then included in the 1979 Gliese–Jahreiss catalogue of nearby stars with an estimated parallax of 125 mas. The small distance from Sun to the GJ 1128 was confirmed by later direct measurements of its parallax.
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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 Nov 26, 2025. The linked authority identifier is Q5872854. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1128, 1944 and 1979.
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This entry incorporates text from “GJ 1128” 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.