Pi Arae
star in the constellation Ara
Pi Arae is a star in the southern constellation of Ara. Its name is a Bayer designation that is Latinized from π Arae, and abbreviated Pi Ara or π Ara. This star is faintly visible to the naked eye with an apparent visual magnitude of +5.25. Based upon an annual parallax shift of 24.38 mas as seen from Earth, it is located 134 light-years (41 pc) from the Sun. It is moving closer to the Sun with a radial velocity of −2 km/s.
The stellar classification of this star is A5 IV-V, indicating the spectrum displays the hybrid features of both a main sequence and a more evolved subgiant star. Pi Arae is an estimated 319 million years old and is spinning with a projected rotational velocity of 54.1 km/s. The star has 1.73 times the mass of the Sun and 1.90 times the Sun's radius. It is radiating 13.3 times the Sun's luminosity from its photosphere at an effective temperature of about 8,215 K.
Pi Arae displays an excess emission of infrared radiation, which may be explained by circumstellar dust. The thermal emission matches a two component model, consisting of an inner disk of warm crystalline silicate dust and an outer colder disk of dirty ice.
This brief starts where responsible research should: with the source description of “Pi Arae” as star in the constellation Ara. Everything that follows is an evidence route, not borrowed authority.
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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 Dec 18, 2025. The linked authority identifier is Q2545579. None of the 0 selected statements returned an explicit reference.
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This entry incorporates text from “Pi Arae” 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.