{{Short description|Star in the constellation Draco}} {{about-distinguish2|A Draconis|[[Alpha Draconis]]}} {{Starbox begin}} {{Starbox observe | epoch = J2000 | constell = [[Draco (constellation)|Draco]] | ra = {{RA|16|27|59.01603}}<ref name=GaiaDR2/> | dec = {{DEC|+68|46|05.3051}}<ref name=GaiaDR2/> | appmag_v = 4.94<ref name=Anderson2012/> }} {{Starbox character | class = B9.5IV<ref name=abt1995/> | b-v = {{Val|−0.051|0.006}}<ref name=Anderson2012/> | u-b = }} {{Starbox astrometry | radial_v = {{Val|−6.7|2.8}}<ref name=Anderson2012/> | prop_mo_ra = −24.818<ref name=GaiaDR2/> | prop_mo_dec = +33.623<ref name=GaiaDR2/> | parallax = 7.2102 | p_error = 0.1296 | parallax_footnote = <ref name=GaiaDR2/> | absmag_v = −0.93<ref name=Anderson2012/> }} {{Starbox detail | mass = 2.6<ref name=tic/> | radius = 4.9<ref name=tic/> | luminosity = 213<ref name=tic/> | gravity = 3.47<ref name=tic/> | temperature = 9,994<ref name=tic/> | metal_fe = | rotational_velocity = 154<ref name=Royer2002/> | age_myr = 306<ref name=gontcharov2012/> }} {{Starbox catalog | names = {{odlist | B=A Draconis | F=15 Dra | BD=+69°850 | FK5=619 | HD=149212 | HIP=80650 | HR=6161 | SAO=17107 }}<ref name=SIMBAD/> }} {{Starbox reference | Simbad = 15+Dra }} {{Starbox end}}
'''15 Draconis''' is a single<ref name=Eggleton2008/> [[star]] in the northern [[circumpolar constellation]] of [[Draco (constellation)|Draco]], located 452 [[light year]]s away from the Sun. ''15 Draconis'' is the [[Flamsteed designation]]; it also has the [[Bayer designation]] ''A Draconis''.<ref name=xref/> This object is visible to the naked eye as a white-hued star with an [[apparent visual magnitude]] of 4.94.<ref name=Anderson2012/> It is moving closer to the Earth with a heliocentric [[radial velocity]] of −7 km/s.<ref name=Anderson2012/>
This star has a [[stellar classification]] of A0 III,<ref name=Cowley1972/> matching that of an [[A-type star|A-type]] [[giant star]]. It has a relatively high rate of spin with a [[projected rotational velocity]] of 154 km/s.<ref name=Royer2002/> The star is radiating 213 times the [[Sun's luminosity]] from its [[photosphere]] at an [[effective temperature]] of {{val|fmt=commas|9994|ul=K}}.<ref name=tic/>
==References== <references> <ref name=SIMBAD>{{cite simbad | title=HD 40409 | access-date=2018-07-16 }}</ref>
<ref name=xref>{{cite journal | last1=Kostjuk | first1=N. D. | title=VizieR Online Data Catalog: HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index (Kostjuk, 2002) | journal=VizieR On-line Data Catalog: IV/27A. Originally Published in: Institute of Astronomy of Russian Academy of Sciences (2002) | volume=4027 | year=2004 | bibcode=2004yCat.4027....0K }}</ref>
<ref name=abt1995>{{cite journal |last1=Abt |first1=Helmut A. |last2=Morrell |first2=Nidia I. |title=The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars |journal=The Astrophysical Journal Supplement Series |date=1995 |volume=99 |page=135 |doi=10.1086/192182 |bibcode=1995ApJS...99..135A }}</ref>
<ref name=GaiaDR2>{{cite DR2}}</ref>
<ref name=tic>{{cite journal |last1=Stassun |first1=Keivan G. |last2=Oelkers |first2=Ryan J. |last3=Paegert |first3=Martin |last4=Torres |first4=Guillermo |last5=Pepper |first5=Joshua |last6=De Lee |first6=Nathan |last7=Collins |first7=Kevin |last8=Latham |first8=David W. |last9=Muirhead |first9=Philip S. |last10=Chittidi |first10=Jay |last11=Rojas-Ayala |first11=Bárbara |last12=Fleming |first12=Scott W. |last13=Rose |first13=Mark E. |last14=Tenenbaum |first14=Peter |last15=Ting |first15=Eric B. |last16=Kane |first16=Stephen R. |last17=Barclay |first17=Thomas |last18=Bean |first18=Jacob L. |last19=Brassuer |first19=C. E. |last20=Charbonneau |first20=David |last21=Ge |first21=Jian |last22=Lissauer |first22=Jack J. |last23=Mann |first23=Andrew W. |last24=McLean |first24=Brian |last25=Mullally |first25=Susan |last26=Narita |first26=Norio |last27=Plavchan |first27=Peter |last28=Ricker |first28=George R. |last29=Sasselov |first29=Dimitar |last30=Seager |first30=S. |display-authors=1 |title=The Revised TESS Input Catalog and Candidate Target List |journal=The Astronomical Journal |date=2019 |volume=158 |issue=4 |page=138 |doi=10.3847/1538-3881/ab3467 |doi-access=free |arxiv=1905.10694 |bibcode=2019AJ....158..138S }}</ref>
<ref name=gontcharov2012>{{cite journal |last1=Gontcharov |first1=G. A. |title=Dependence of kinematics on the age of stars in the solar neighborhood |journal=Astronomy Letters |date=2012 |volume=38 |issue=12 |page=771 |doi=10.1134/S1063773712120031 |arxiv=1606.08814 |bibcode=2012AstL...38..771G }}</ref>
<ref name=Anderson2012>{{cite journal | title=XHIP: An extended hipparcos compilation | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | journal=Astronomy Letters | volume=38 | issue=5 | pages=331 | year=2012 | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | arxiv=1108.4971 | s2cid=119257644 }}</ref>
<ref name=Eggleton2008>{{citation | title=A catalogue of multiplicity among bright stellar systems | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869 | date=2008 | doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | postscript=. | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | s2cid=14878976 }}</ref>
<ref name=Cowley1972>{{citation | last1=Cowley | first1=A. | title=Spectral classification of the bright B8 stars | journal=Astronomical Journal | volume=77 | pages=750–755 | date=November 1972 | doi=10.1086/111348 | bibcode=1972AJ.....77..750C | postscript=. }}</ref>
<ref name=Royer2002>{{citation | display-authors=1 | last1=Royer | first1=F. | last2=Grenier | first2=S. | last3=Baylac | first3=M.-O. | last4=Gómez | first4=A. E. | last5=Zorec | first5=J. | title=Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i | journal=Astronomy and Astrophysics | volume=393 | pages=897–911 | date=October 2002 | doi=10.1051/0004-6361:20020943 | bibcode=2002A&A...393..897R | arxiv=astro-ph/0205255 | s2cid=14070763 }}</ref> </references>
{{Stars of Draco}}
[[Category:B-type subgiants]] [[Category:Draco (constellation)]] [[Category:Flamsteed objects|Draconis, 15]] [[Category:Bayer objects|Draconis, A]] [[Category:Durchmusterung objects]] [[Category:Henry Draper Catalogue objects|149212]] [[Category:Hipparcos objects|080650]] [[Category:Bright Star Catalogue objects|6161]]