}}{{Starbox reference
| Simbad = HD+127986
}}{{Starbox end}}CP Boötis is a yellow-white hued star in the northern constellation of Boötes. With a baseline apparent visual magnitude of 6.40,[3] it is at or near the lower limit for visibility with the typical naked eye in good viewing conditions. The distance to this star can be estimated from its annual parallax shift of {{Val|12.91|ul=mas}},[1] which yields a range of 252.6 light years. It is moving further away with a heliocentric radial velocity of +5.9 km/s.[9]This is an F-type subgiant star with a stellar classification of F8 IVw,[5] which indicates it has nearly consumed the hydrogen at its core and is now evolving into a giant star. It is a low amplitude Delta Scuti variable[26] that varies by 0.02 magnitude.[27] At the age of 1.7[9] billion years it is spinning with a projected rotational velocity of 5.7 km/s.[4] The star has 1.77[9] times the mass of the Sun and is radiating 12[15] times the Sun's luminosity from its photosphere at an effective temperature of 6,276 K.[9]
References
1. ^1 2 3 4 5 6 {{cite DR2}}
2. ^1 {{citation | title=General catalogue of variable stars: Version GCVS 5.1 | last1=Samus' | first1=N. N | last2=Kazarovets | first2=E. V | last3=Durlevich | first3=O. V | last4=Kireeva | first4=N. N | last5=Pastukhova | first5=E. N | journal=Astronomy Reports | volume=61 | pages=80 | year=2017 | postscript=. | doi=10.1134/S1063772917010085 | bibcode=2017ARep...61...80S }}
See:CP Boo
3. ^1 {{citation | postscript=. | title=CP Boötis | last1=Watson | first1=Christopher | date=January 4, 2010 | work=AAVSO Website | publisher=American Association of Variable Star Observers | url=http://www.aavso.org/vsx/index.php?view=detail.top&oid=4419 | accessdate=3 August 2014}}
4. ^1 2 3 4 5 6 7 8 9 10 {{citation | display-authors=1 | last1=Casagrande | first1=L. | last2=Schönrich | first2=R. | last3=Asplund | first3=M. | last4=Cassisi | first4=S. | last5=Ramírez | first5=I. | last6=Meléndez | first6=J. | last7=Bensby | first7=T. | last8=Feltzing | first8=S. | title=New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey | journal=Astronomy and Astrophysics | volume=530 | page=A138 | date=June 2011 | doi=10.1051/0004-6361/201016276 | arxiv=1103.4651 | bibcode=2011A&A...530A.138C | postscript=. }}
5. ^1 2 {{citation | title=Lithium and rotation on the subgiant branch. II. Theoretical analysis of observations | display-authors=1 | last1=do Nascimento | first1=J. D., Jr. | last2=Charbonnel | first2=C. | last3=Lèbre | first3=A. | last4=de Laverny | first4=P. | last5=De Medeiros | first5=J. R. | journal=Astronomy and Astrophysics | postscript=. | volume=357 | pages=931–937 | date=May 2000 | bibcode=2000A&A...357..931D | arxiv=astro-ph/0003010 }}
6. ^1 {{citation | title=Chemical composition of δ Scuti stars: 1. AO CVn, CP Boo, KW Aur | last1=Galeev | first1=A. I. | last2=Ivanova | first2=D. V. | last3=Shimansky | first3=V. V. | last4=Bikmaev | first4=I. F. | journal=Astronomy Reports | display-authors=1 | volume=56 | issue=11 | pages=850–866 | date=November 2012 | doi=10.1134/S1063772912110029 | bibcode=2012ARep...56..850G }}
7. ^1 2 3 4 5 {{citation | last1=Karatas | first1=Y. | last2=Schuster | first2=W. J. | title=Metallicity and absolute magnitude calibrations for UBV photometry | journal=Monthly Notices of the Royal Astronomical Society | volume=371 | issue=4 | pages=1793–1812 | date=October 2006 | bibcode=2006MNRAS.371.1793K | doi=10.1111/j.1365-2966.2006.10800.x | postscript=. }}
8. ^1 2 3 {{citation | title=Lithium and rotation on the subgiant branch. I. Observations and spectral analysis | journal=Astronomy and Astrophysics | display-authors=1 | last1=Lèbre | first1=A. | last2=De Laverny | first2=P. | last3=De Medeiros | first3=J. R. | last4=Charbonnel | first4=C. | last5=Da Silva | first5=L. | volume=345 | pages=936 | year=1999 | bibcode=1999A&A...345..936L | postscript=. }}
9. ^1 2 {{citation | title=Spectral classification of A & F stars | last1=Barry | first1=Don C. | journal=Astrophysical Journal Supplement | volume=19 | pages=281 | date=January 1970 | doi=10.1086/190209 | bibcode=1970ApJS...19..281B }}