Sigma3 Cancri
Star in the constellation Cancer
title: "Sigma3 Cancri" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["g-type-giants", "horizontal-branch-stars", "cancer-(constellation)", "bayer-objects", "bright-star-catalogue-objects", "durchmusterung-objects", "flamsteed-objects", "henry-draper-catalogue-objects", "hipparcos-objects"] description: "Star in the constellation Cancer" topic_path: "science/astronomy" source: "https://en.wikipedia.org/wiki/Sigma3_Cancri" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary Star in the constellation Cancer ::
| name = Sigma3 Cancri | epoch = J2000.0 | equinox = J2000.0 (ICRS) | constell = Cancer | ra = | dec = | appmag_v = +5.24 | type = red clump | class = G9 III | b-v = +0.91 | u-b = +0.64 | r-i = | variable = | radial_v = | prop_mo_ra = −43.741 | prop_mo_dec = −34.754 | pm_footnote = | parallax = 10.7481 | p_error = 0.0965 | parallax_footnote = | absmag_v = 0.45 | source = | mass = | radius = 10.32 | luminosity = 72 | temperature = | gravity = 3.18 | metal_fe = | rotational_velocity = | age_myr = | names = | Simbad = sig03+Cnc Sigma3 Cancri is a solitary, yellow-hued star in the zodiac constellation of Cancer. Its name is a Bayer designation that is Latinized from σ3 Cancri, and abbreviated Sigma3 Cnc or σ3 Cnc. With an apparent visual magnitude of +5.24, it is a dim star that is visible to the naked eye. Based upon an annual parallax shift of as seen from Earth, it is located approximately 303 ly from the Sun. The star's proper motion makes it a candidate for membership in the IC 2391 supercluster.
This is an evolved, G-type giant star with a stellar classification of G9 III. At the estimated age of 420 million years it is a red clump star on the horizontal branch, which indicates it is generating energy through helium fusion at its core. Sigma3 Cancri has 2.8 times the mass of the Sun and has expanded to 10.3 times the Sun's radius. It is radiating 72 times the solar luminosity from its photosphere at an effective temperature of 5,170 K.
References
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| title=sig03 Cnc | mode=cs2 | accessdate=2017-06-11 | postscript=. }}
References
- {{Cite Gaia DR3. 712117436084443008
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