- References
| name = 1 Cancri
}}{{Starbox observe
| epoch = J2000.0
| constell = Cancer
| ra = {{RA|07|56|59.45230}}[1]
| dec = {{DEC|+15|47|25.0026}}[1]
| appmag_v = 5.97[3]
}}{{Starbox character
| class = K3− III[4]
| r-i =
| v-r =
| b-v = {{Val|1.285|0.007}}[5]
| u-b =
| variable =
}}{{Starbox astrometry
| radial_v = {{Val|+13.93|0.15}}[1]
| prop_mo_ra = −26.794[1]
| prop_mo_dec = −42.701[1]
| parallax = 7.1899
| p_error = 0.0958
| parallax_footnote = [1]
| absmag_v = 0.03[5]
}}{{Starbox detail
| source =
| mass =
| radius = 31[11]
| luminosity = 137[1]
| temperature = 4,367[1]
| gravity =
| metal_fe =
| rotational_velocity =
| age_myr =
}}{{Starbox catalog
| names = {{odlist | F=1 Cnc | BD=+16°1590 | FK5=1208 | HD=64960 | HIP=38848 | HR=3095 | SAO=97399 }}
}}{{Starbox reference
| Simbad = 1+Cnc
}}{{Starbox end}}1 Cancri is a single[3] star in the zodiac constellation of Cancer, positioned near the border with Gemini at a distance of around 470 light years from the Sun.[1] It is barely visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 5.97.[3] The object is moving further from the Earth with a heliocentric radial velocity of +14 km/s.[1]
This is an evolved giant star with a stellar classification of K3− III,[4] having exhausted the hydrogen at its core and expanded. It is specified as a spectral standard for that type.[4] The angular diameter of the star measured from a lunar occultation is {{Val|2.1|0.6|ul=mas}},[21] which, at its estimated distance, equates to a physical radius of about 31 times the radius of the Sun.[11] It is radiating 137[23] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,487 K.[23]
References
1. ^1 2 3 4 5 6 7 8 9 10 {{Cite Gaia DR2|666735780843072256}}
2. ^1 2 {{citation | title=XHIP: An extended hipparcos compilation | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | journal=Astronomy Letters | arxiv=1108.4971 | volume=38 | issue=5 | pages=331 | year=2012 | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | postscript=. }}
3. ^1 2 3 {{citation | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869–879 | date=September 2008 | doi=10.1111/j.1365-2966.2008.13596.x | arxiv=0806.2878 | bibcode=2008MNRAS.389..869E | postscript=. }}
4. ^1 2 {{citation | display-authors=1 | last1=McDonald | first1=I. | last2=Zijlstra | first2=A. A. | last3=Boyer | first3=M. L. | title=Fundamental Parameters and Infrared Excesses of Hipparcos Stars | journal=Monthly Notices of the Royal Astronomical Society | volume=427 | issue=1 | pages=343–57 | date=2012 | bibcode=2012MNRAS.427..343M | arxiv=1208.2037 | doi=10.1111/j.1365-2966.2012.21873.x | postscript=. }}
5. ^1 {{citation | display-authors=1 | last1=Richichi | first1=A. | last2=Percheron | first2=I. | last3=Khristoforova | first3=M. | title=CHARM2: An updated Catalog of High Angular Resolution Measurements | journal=Astronomy and Astrophysics | volume=431 | issue=2 | pages=773–777 | date=February 2005 | doi=10.1051/0004-6361:20042039 | bibcode=2005A&A...431..773R }}
6. ^1 2 {{citation | first1=Kenneth R. | last1=Lang | title=Astrophysical formulae | volume=1 | series=Astronomy and astrophysics library | edition=3rd | publisher=Birkhäuser | date=2006 | isbn=978-3-540-29692-8 | postscript=. | url=https://books.google.com/books?id=OvTjLcQ4MCQC&pg=PA41 }} The radius (R*) is given by::
7. ^1 2 3 {{citation | title=The Perkins catalog of revised MK types for the cooler stars | journal=Astrophysical Journal Supplement Series | last1=Keenan | first1=Philip C. | last2=McNeil | first2=Raymond C. | volume=71 | pages=245| year=1989 | postscript=. | bibcode=1989ApJS...71..245K | doi=10.1086/191373 }}
[1][2][3][4][5][6][7]2. ^1 2 {{citation | title=XHIP: An extended hipparcos compilation | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | journal=Astronomy Letters | arxiv=1108.4971 | volume=38 | issue=5 | pages=331 | year=2012 | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | postscript=. }}
3. ^1 2 3 {{citation | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869–879 | date=September 2008 | doi=10.1111/j.1365-2966.2008.13596.x | arxiv=0806.2878 | bibcode=2008MNRAS.389..869E | postscript=. }}
4. ^1 2 {{citation | display-authors=1 | last1=McDonald | first1=I. | last2=Zijlstra | first2=A. A. | last3=Boyer | first3=M. L. | title=Fundamental Parameters and Infrared Excesses of Hipparcos Stars | journal=Monthly Notices of the Royal Astronomical Society | volume=427 | issue=1 | pages=343–57 | date=2012 | bibcode=2012MNRAS.427..343M | arxiv=1208.2037 | doi=10.1111/j.1365-2966.2012.21873.x | postscript=. }}
5. ^1 {{citation | display-authors=1 | last1=Richichi | first1=A. | last2=Percheron | first2=I. | last3=Khristoforova | first3=M. | title=CHARM2: An updated Catalog of High Angular Resolution Measurements | journal=Astronomy and Astrophysics | volume=431 | issue=2 | pages=773–777 | date=February 2005 | doi=10.1051/0004-6361:20042039 | bibcode=2005A&A...431..773R }}
6. ^1 2 {{citation | first1=Kenneth R. | last1=Lang | title=Astrophysical formulae | volume=1 | series=Astronomy and astrophysics library | edition=3rd | publisher=Birkhäuser | date=2006 | isbn=978-3-540-29692-8 | postscript=. | url=https://books.google.com/books?id=OvTjLcQ4MCQC&pg=PA41 }} The radius (R*) is given by::
7. ^1 2 3 {{citation | title=The Perkins catalog of revised MK types for the cooler stars | journal=Astrophysical Journal Supplement Series | last1=Keenan | first1=Philip C. | last2=McNeil | first2=Raymond C. | volume=71 | pages=245| year=1989 | postscript=. | bibcode=1989ApJS...71..245K | doi=10.1086/191373 }}
}}{{Stars of Cancer}}
7 : K-type giants|Cancer (constellation)|Durchmusterung objects|Flamsteed objects|Henry Draper Catalogue objects|Hipparcos objects|HR objects