Menu
Home
People
Places
Arts
History
Plants & Animals
Science
Life & Culture
Technology
Reference.org
Alpha2 Canum Venaticorum variable
open-in-new
<h2 id="naked-eye-examples">Naked eye examples</h2> <p>This list shows selected variables of this class that are visible to the <a href="/facts/Naked_eye/ePEIa0lK">naked eye</a>. That is, their typical brightness is magnitude 6.5 or brighter. </p> List of Alpha2 Canum Venaticorum Variables<a class="footnote-ref" id="fnref:8" href="#fn:8"><sup>8</sup></a><table><tbody><tr><th>Designation (name)</th><th>Constellation</th><th>Discovery</th><th><i><a href="/facts/Apparent_magnitude/7pCTF1Me">Apparent magnitude</a></i> (Maximum)</th><th><i><a href="/facts/Apparent_magnitude/7pCTF1Me">Apparent magnitude</a></i> (Minimum)</th><th><i>Range of magnitude</i></th><th>Spectral type</th><th>Comment</th></tr><tr><td>(α2 Canum Venaticorum) <a href="/facts/Cor_Caroli/pI4X6akf">Cor Caroli</a></td><td><a href="/facts/Canes_Venatici/JRRTncYm">Canes Venatici</a></td><td> </td><td>2.84</td><td>2.98</td><td>0.14</td><td>A0Vp(Si-Cr-Eu)</td><td>Prototype</td></tr><tr><td>(ε UMa) <a href="/facts/Alioth/mRadnaBc">Alioth</a></td><td><a href="/facts/Ursa_Major/BFhHcvbW">Ursa Major</a></td><td></td><td>1.76</td><td></td><td>0.02</td><td>A1III-IVp kB9(Cr-Eu)</td><td>Brightest member</td></tr><tr><td><a href="/facts/Alpha_Doradus/xA9nTKnr">α Dor</a></td><td><a href="/facts/Dorado/SM1WeYuK">Dorado</a></td><td></td><td>3.26</td><td>3.30</td><td>0.04</td><td>B9IIIp(Si)</td><td>One of the hottest; binary</td></tr><tr><td><a href="/facts/Alpha_Piscium/wj64SzTL">α Psc</a> (Alrescha)</td><td><a href="/facts/Pisces_(constellation)/2neTVRCz">Pisces</a></td><td></td><td>3.82</td><td>3.83</td><td>0.01</td><td>A2IVp(Sr)</td><td>Binary</td></tr><tr><td><a href="/facts/Beta_Hydrae/YGJXxEH7">β Hydrae</a> A</td><td><a href="/facts/Hydra_(constellation)/71YLVls1">Hydra</a></td><td>1834</td><td>4.67</td><td>4.71</td><td>0.04</td><td>B8.5IIIp(Si)</td><td>Hottest member; binary</td></tr><tr><td><a href="/facts/HD_187474/qnPGN2W9">HD 187474</a></td><td><a href="/facts/Sagittarius_(constellation)/ljtU4DQ2">Sagittarius</a></td><td></td><td>5.28</td><td>5.34</td><td>0.06</td><td>A0 EuCrSr</td><td>Long 6.4 year period; binary</td></tr></tbody></table> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Faltová, N.; et al. (December 2021), "A case study of ACV variables discovered in the Zwicky Transient Facility survey", Astronomy & Astrophysics, 656, id. A125, arXiv:2108.11411, Bibcode:2021A&A...656A.125F, doi:10.1051/0004-6361/202141534. <a href="/wiki/ArXiv_(identifier)" target="_blank">/wiki/ArXiv_(identifier)</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Variability types, General Catalogue of Variable Stars, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line August 20, 2008. <a href="http://www.sai.msu.su/groups/cluster/gcvs/gcvs/iii/vartype.txt" target="_blank">http://www.sai.msu.su/groups/cluster/gcvs/gcvs/iii/vartype.txt</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>alf 2 CVn , database entry, General Catalogue of Variable Stars Archived 2017-06-20 at the Wayback Machine, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line August 20, 2008. <a href="http://www.sai.msu.su/groups/cluster/gcvs/gcvs/iii/iii.dat" target="_blank">http://www.sai.msu.su/groups/cluster/gcvs/gcvs/iii/iii.dat</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>Faltová, N.; et al. (December 2021), "A case study of ACV variables discovered in the Zwicky Transient Facility survey", Astronomy & Astrophysics, 656, id. A125, arXiv:2108.11411, Bibcode:2021A&A...656A.125F, doi:10.1051/0004-6361/202141534. <a href="/wiki/ArXiv_(identifier)" target="_blank">/wiki/ArXiv_(identifier)</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>pp. 83–85, Variable Stars, Michel Petit, foreword by Paolo Maffei, tr. from French by W. J. Duffin, Chichester, UK: John Wiley & Sons, 1987, ISBN 0-471-90920-3. <a href="/wiki/ISBN_(identifier)" target="_blank">/wiki/ISBN_(identifier)</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>Faltová, N.; et al. (December 2021), "A case study of ACV variables discovered in the Zwicky Transient Facility survey", Astronomy & Astrophysics, 656, id. A125, arXiv:2108.11411, Bibcode:2021A&A...656A.125F, doi:10.1051/0004-6361/202141534. <a href="/wiki/ArXiv_(identifier)" target="_blank">/wiki/ArXiv_(identifier)</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> <li id="fn:7"><p>Faltová, N.; et al. (December 2021), "A case study of ACV variables discovered in the Zwicky Transient Facility survey", Astronomy & Astrophysics, 656, id. A125, arXiv:2108.11411, Bibcode:2021A&A...656A.125F, doi:10.1051/0004-6361/202141534. <a href="/wiki/ArXiv_(identifier)" target="_blank">/wiki/ArXiv_(identifier)</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li> <li id="fn:8"><p>Samus', N. N.; et al. (2017), "General catalogue of variable stars: Version GCVS 5.1", Astronomy Reports, 61 (1): 80–88, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085, S2CID 125853869. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></p></li> </ol>