57 Cancri
Star in the constellation Cancer
title: "57 Cancri" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["g-type-giants", "k-type-giants", "binary-stars", "cancer-(constellation)", "durchmusterung-objects", "flamsteed-objects", "hipparcos-objects", "henry-draper-catalogue-objects", "bright-star-catalogue-objects"] description: "Star in the constellation Cancer" topic_path: "science/astronomy" source: "https://en.wikipedia.org/wiki/57_Cancri" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary Star in the constellation Cancer ::
| name = 57 Cancri | epoch = J2000.0 | constell = Cancer | ra = | dec = | appmag_v = +5.40 (6.09 + 6.37) | type = | class = G7 III + K0 III | b-v = 1.05 | u-b = | variable = | radial_v = | prop_mo_ra = +41.60 | prop_mo_dec = −24.02 | parallax = 7.07 | p_error = 0.68 | parallax_footnote = | absmag_v = –0.33 | component1 = 57 Cnc A | mass = | radius = | luminosity = 173.13 | temperature = | gravity = | metal_fe = | names = | Simbad = 57+Cnc
57 Cancri is a double star in the zodiac constellation of Cancer, located around 460 light years away from the Sun. They are visible to the naked eye as a faint star with a combined apparent visual magnitude of +5.40. The brighter member, designated component A. is a yellow-hued giant star with a stellar classification of G7 III and an apparent magnitude of +6.09. Its companion, component B, is an orange-hued giant with a class of K0 III and an apparent magnitude of +6.37. As of 2017, the pair had an angular separation of along a position angle of 310°. This angular separation translates to a projected separation of 180 astronomical units.
References
References
- "57 Cnc".
- Bätz, J.. (2025-10-10). "Radial Velocity Monitoring and Analysis of Gaia Astrometry of Selected Intermediate Mass Stars to Constrain Their Multiplicity Status".
::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::