Psi2 Aquarii
sat in the constellation Aquarius
Psi2 Aquarii, Latinized from ψ2 Aquarii, is the Bayer designation for a star in the equatorial constellation of Aquarius. It is visible to the naked eye with an apparent visual magnitude of 4.4. Based upon parallax measurements made during the Hipparcos mission, the distance to this star is roughly 400 light-years (120 parsecs).
This is a B-type main sequence star with a stellar classification of B5 Vn. The 'n' suffix indicates that the absorption lines in the spectrum are being broadened by Doppler shift from the star's rapid rotation rate. The projected rotational velocity of the star is 341 km/s. Psi2 Aquarii is 4.6 times as large as the Sun with an effective temperature of 15,212 K in its outer envelope.
It is a λ Eridani variable, or periodic Be star, with a pulsation cycle lasting 1.073 days. The amplitude of the variation is 0.024 in magnitude.
“Psi2 Aquarii” enters the record as sat in the constellation Aquarius. Crown Archives preserves that source wording while asking what Psi2, Aquarii and constellation can confirm, complicate or overturn.
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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 Mar 11, 2026. The linked authority identifier is Q3604297. None of the 0 selected statements returned an explicit reference.
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This entry incorporates text from “Psi2 Aquarii” 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.