| 词条 | X Cancri |
| 释义 |
| image={{Location mark |image=Cancer constellation map.svg|alt=|float=center|width=260 |label=|position=right |mark=Red circle.svg|mark_width=8|mark_link=X Cnc |x=410|y=520 }} |caption=Location of X Cancri (circled) }}{{Starbox observe | name = | epoch = J2000.0[1] | constell = Cancer[1] | ra = {{RA|08|55|22.88131}}[1] | dec = {{DEC|+17|13|52.5894}}[1] | appmag_v = 5.69 - 6.94[5] }}{{Starbox character | class =C5,4(N3)[5] }}{{Starbox catalog | names = BD+17° 1973, HD 76221, HIP 43811, HR 3541 }}{{Starbox end}}X Cancri is a semiregular variable star located in the constellation Cancer.[1] It varies between magnitudes 5.69 and 6.94 over 180 days.[2] Located around 1116 light-years distant, it shines with a luminosity approximately 4695 times that of the Sun and has a surface temperature of 3317 K.[3] It has a radius of {{solar radius|470}}.[4] References1. ^1 2 3 4 {{cite simbad|title=V* X Cnc|accessdate=22 July 2014}} {{Stars of Cancer}}{{var-star-stub}}2. ^1 2 {{cite web|url=http://www.aavso.org/vsx/index.php?view=detail.top&oid=4811 |title=X Cancri |author =Otero, Sebastian Alberto |date=30 June 2011 |work=AAVSO Website|publisher=American Association of Variable Star Observers|accessdate=22 July 2014}} 3. ^{{cite journal|author=McDonald, I.|author2=Zijlstra, A. A.|author3=Boyer, M. L.|date=2012|title=Fundamental Parameters and Infrared Excesses of Hipparcos Stars|journal=Monthly Notices of the Royal Astronomical Society|volume=427|issue=1|pages=343–57|bibcode=2012MNRAS.427..343M|doi=10.1111/j.1365-2966.2012.21873.x|arxiv = 1208.2037 }} 4. ^{{cite journal|bibcode=1992ApJ...384..634L|title=A VLA 3.6 centimeter survey of N-type carbon stars|journal=Astrophysical Journal|volume=384|pages=634|author1=Luttermoser|first1=Donald G.|last2=Brown|first2=Alexander|year=1992|doi=10.1086/170905}} 9 : Cancer (constellation)|Semiregular variable stars|C-type stars|Objects with variable star designations|Durchmusterung objects|Henry Draper Catalogue objects|Hipparcos objects|Asymptotic-giant-branch stars|HR objects |
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