Chi Serpentis
star in the constellation Serpens
Chi Serpentis (χ Ser, χ Serpentis) is a solitary star in the Serpens Caput section of the equatorial constellation Serpens. Based upon an annual parallax shift of 14.84 mas as seen from Earth, it is located around 222 light years from the Sun. The star is bright enough to be faintly visible to the naked eye, having an apparent visual magnitude of +5.30.
In 1966 it was listed as a suspected spectroscopic binary, but it is believed to be single. This is a chemically peculiar star Ap star with a stellar classification of A2 Vp MnEu(Sr), indicating the spectrum shows abnormal excesses of manganese and europium. The star has 2.11 times the mass of the Sun and about 2.25 times the Sun's radius. It is radiating 26 times the solar luminosity from its photosphere at an effective temperature of 9,557 K. At the age of 212 million years, it is spinning with a rotation period of 1.6 days.
Chi Serpentis is classified as an Alpha2 Canum Venaticorum type variable star, and its magnitude varies by 0.03 with a period of 1.5948 days. The pattern of variation in the spectrum suggest there are regions of enhanced strontium, chromium, iron, titanium, and magnesium on the surface of the star.
“Chi Serpentis” enters the record as star in the constellation Serpens. Crown Archives preserves that source wording while asking what Serpentis, star and constellation can confirm, complicate or overturn.
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“Chi Serpentis” is worth following because a concise public description often conceals a longer documentary argument. Here, Serpentis, star and constellation provides the most credible route into that argument.
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 14, 2026. The linked authority identifier is Q3304177. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1966.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Chi Serpentis” 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.