45 Boötis
{{Short description|Single star in the constellation Boötes}}
{{Starbox begin}}
{{Starbox observe
| epoch = J2000
| constell = Boötes
| dec = {{DEC|+24|52|09.0952}}
}}
{{Starbox character
| type =
| variable =
}}
{{Starbox astrometry
| parallax = 51.6674
| p_error = 0.1882
}}
{{Starbox detail
| mass = {{Val|1.21|0.16}}
| radius = {{Val|1.461|0.027}}
| luminosity = {{Val|3.30|0.25|0.22}}
| temperature = 6,435
| metal_fe = −0.02
| gravity = 4.19
| rotational_velocity = 39.8
| age_gyr = {{Val|1.6|0.8|0.6}}
}}
{{Starbox catalog
| names = {{odlist | B=c Boo | F=45 Boo | V=NSV 6945 | BD=+25°2873 | FK5=1396 | GJ=578 | HD=134083 | HIP=73996 | HR=5634 | SAO=83671 | WDS=J15073+2452 }}
}}
{{Starbox reference
| Simbad=HD+134083
}}
{{Starbox end}}
45 Boötis is a single star located 63 light years away from the Sun in the northern constellation of Boötes. It has the Bayer designation c Boötis; 45 Boötis is the Flamsteed designation. This body is visible to the naked eye as a faint, yellow-white hued star with an apparent visual magnitude of 4.93. It has a relatively high proper motion, traversing the celestial sphere at the rate of {{Val|0.247|ul=arcsecond}} per year. The star is moving closer to the Earth with a heliocentric radial velocity of −11 km/s, and is a stream member of the Ursa Major Moving Group.
This is an F-type main-sequence star with a stellar classification of F5 V. It is around 1.6 billion years old and is spinning with a projected rotational velocity of 40 km/s. The star has 1.2 times the mass of the Sun and 1.46 times the Sun's radius. It is radiating 3.3 times the luminosity of the Sun from its photosphere at an effective temperature of 6,435 K. 45 Boötis is a source of X-ray emission.
There is a magnitude 11.53 visual companion at an angular separation of {{Val|103.50|ul=arcsecond}} along a position angle (PA) of 40°, as of 2012. A magnitude 10.23 star can be found at a separation of {{Val|247.90|u=arcsecond}} with a PA of 358°, as of 2015.
References
{{reflist|refs=
{{cite DR2|1264630412816366720}}
{{cite simbad | title=40 Boo | access-date=May 12, 2019 }}
| 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 | doi-access=free | postscript=.
| bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | s2cid=14878976 }}
| last1=Malagnini | first1=M. L. | last2=Morossi | first2=C.
| title=Accurate absolute luminosities, effective temperatures, radii, masses and surface gravities for a selected sample of field stars
| journal=Astronomy and Astrophysics Supplement Series
| volume=85 | issue=3 | pages=1015–1019 | date=November 1990
| bibcode=1990A&AS...85.1015M }}
| last1=Valenti | first1=J. A. | last2=Fischer | first2=D. A.
| title=Spectroscopic Properties of Cool Stars (SPOCS). I. 1040 F, G, and K Dwarfs from Keck, Lick, and AAT Planet Search Programs
| journal=The Astrophysical Journal Supplement Series
| volume=159 | pages=141–166 | date=2005 | issue=1 | postscript=.
| bibcode=2005ApJS..159..141V | doi=10.1086/430500 | doi-access=free }}
| last1=Fuhrmann | first1=K. | last2=Chini | first2=R.
| last3=Kaderhandt | first3=L. | last4=Chen | first4=Z.
| title=Multiplicity among Solar-type Stars
| display-authors=1 | journal=The Astrophysical Journal
| volume=836 | issue=1 | pages=139 | year=2017
| bibcode=2017ApJ...836..139F | postscript=. | doi=10.3847/1538-4357/836/1/139| doi-access=free }}
| display-authors=1 | last1=King | first1=Jeremy R.
| last2=Villarreal | first2=Adam R. | last3=Soderblom | first3=David R.
| last4=Gulliver | first4=Austin F. | last5=Adelman | first5=Saul J.
| title=Stellar Kinematic Groups. II. A Reexamination of the Membership, Activity, and Age of the Ursa Major Group
| journal=The Astronomical Journal | postscript=.
| volume=125 | issue=4 | pages=1980 | year=2003
| bibcode=2003AJ....125.1980K | doi=10.1086/368241 | url=https://tigerprints.clemson.edu/cgi/viewcontent.cgi?article=1248&context=physastro_pubs | doi-access=free }}
| title=The Sirius Supercluster and Missing Mass near the Sun
| last1=Eggen | first1=Olin J.
| journal=The Astronomical Journal | postscript=.
| volume=116 | issue=2 | pages=782–788 | date=August 1998
| doi=10.1086/300465 | bibcode=1998AJ....116..782E | doi-access= }}
| last1=Lépine | first1=Sébastien | last2=Shara | first2=Michael M.
| title=A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)
| journal=The Astronomical Journal
| volume=129 | issue=3 | pages=1483–1522 | date=March 2005
| doi=10.1086/427854 | bibcode=2005AJ....129.1483L
| arxiv=astro-ph/0412070 | s2cid=2603568 | postscript=. }}
| last1=Haakonsen | first1=Christian Bernt | last2=Rutledge | first2=Robert E.
| title=XID II: Statistical Cross-Association of ROSAT Bright Source Catalog X-ray Sources with 2MASS Point Source Catalog Near-Infrared Sources
| journal=The Astrophysical Journal Supplement
| volume=184 | issue=1 | pages=138–151 | date=September 2009
| doi=10.1088/0067-0049/184/1/138 | bibcode=2009ApJS..184..138H
| arxiv=0910.3229 | s2cid=119267456 | postscript=. }}
| display-authors=1 | last1=Mason | first1=B. D.
| last2=Wycoff | first2=G. L. | last3=Hartkopf | first3=W. I.
| last4=Douglass | first4=G. G. | last5=Worley | first5=C. E.
| title=The Washington Visual Double Star Catalog
| journal=The Astronomical Journal | year=2014 | volume=122 | issue=6 | page=3466 | bibcode=2001AJ....122.3466M
| doi=10.1086/323920 | postscript=. | doi-access=free }}
}}
External links
- [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%205634 HR 5634]
- [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?CCDM%20J15074%2b2453A CCDM J15074+2453]
- [http://aladin.u-strasbg.fr/AladinPreview?-c=15+07+18.0659%2B24+52+09.104&ident=NSV++6945&submit=Aladin+previewer Image 45 Boötis]
{{Stars of Boötes}}
{{DEFAULTSORT:45 Bootis}}
Category:F-type main-sequence stars
Category:Ursa Major moving group