{{Short description|Star in the constellation Draco}} {{Starbox begin}} {{Starbox image | image = {{Location mark |image=Draco constellation map.svg|alt=|float=center|width=280 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=36 Draconis |x=260|y=675 }} | caption = Location of 36 Draconis (circled in red) }} {{Starbox observe | epoch = J2000 | equinox = <!--Equinox of coordinates (defaults to epoch)--> | constell = [[Draco (constellation)|Draco]] | ra = {{RA|18|13|53.83281}}<ref name=dr3/> | dec = {{DEC|+64|23|50.2258}}<ref name=dr3/> | appmag_v = 4.99<ref name=Ligi2016/> }} {{Starbox character | type = [[main sequence]]<ref name=dr3/> | class = F5 V<ref name=Takeda2005/> + M3<ref name=Rodriguez2015/> | b-v = +0.40<ref name=Takeda2005/> | u-b = | v-i = | variable = }} {{Starbox astrometry | radial_v = −35.6<ref name=Takeda2005/> | prop_mo_ra = +352.918<ref name=dr3/> | prop_mo_dec = +355.572<ref name=dr3/> | parallax = 43.1837 | p_error = 0.0940 | parallax_footnote = <ref name=dr3/> | absmag_v = 3.14<ref name=Takeda2005/> + 7.4<ref name=Rodriguez2015/> }} {{Starbox detail | source = <ref name=Ligi2016/> | mass = {{Val|1.23|0.15}} | radius = {{Val|1.635|0.037}} | luminosity = {{Val|4.66|0.12}} | gravity = {{Val|4.1|0.5}} | metal_fe = {{Val|−0.3|0.1}} | temperature = {{Val|6638|83|fmt=commas}} | rotation = | rotational_velocity = 8<ref name=Takeda2005/> | age_gyr = 2.95<ref name=Takeda2007/> }} {{Starbox catalog | names = {{odlist | F=36 Dra | BD=+64°1252 | FK5=685 | GJ=9619 | HD=168151 | HIP=89348 | HR=6850 | SAO=17828 }}<ref name=SIMBAD>{{cite simbad | title=36 Dra | access-date=2018-01-27 }}</ref> }} {{Starbox reference | Simbad = 36+Dra }} {{Starbox end}}
'''36 Draconis''' is a [[star]] in the northern [[constellation]] [[Draco (constellation)|Draco]]. It is faintly visible to the naked eye with an [[apparent visual magnitude]] of 4.99.<ref name=Ligi2016/> Based upon an annual [[stellar parallax|parallax shift]] of {{val|43.18|ul=mas}}, it is located about 75.5 [[light year]]s away. At that distance, the visual magnitude is diminished by an [[Extinction (astronomy)|extinction]] of 0.129 due to [[interstellar dust]].<ref name=Ligi2016/> The star has a relatively high [[proper motion]], traversing the [[celestial sphere]] at the rate of 0.353 [[arc second]]s per year.<ref name=Lepine2005/> It is moving closer to the Sun with a [[radial velocity]] of −35.6 km/s.<ref name=Takeda2005/>
[[File:36 Draconis.jpg|thumb|left|36 Draconis captured by the [[Euclid Space Telescope]]]] This is an ordinary [[F-type main-sequence star]] with a [[stellar classification]] of F5 V.<ref name=Takeda2005/> It has 1.23 times the [[mass of the Sun]] and 1.64 times the [[Sun's radius]].<ref name=Ligi2016/> The star is around three<ref name=Takeda2007/> billion years old and is spinning with a [[projected rotational velocity]] of 8 km/s.<ref name=Takeda2005/> It is radiating 4.7 times the [[Sun's luminosity]] from its [[photosphere]] at an [[effective temperature]] of 6,638 K.<ref name=Ligi2016/>
Observations carried out in 2010 and 2012 detected a faint companion at an [[angular separation]] of 3.3 [[arcsecond]]s. Judging by the age and magnitude, this is a [[red dwarf]] of class M3.<ref name=Rodriguez2015/>
{{clear left}} ==References== <references> <ref name=dr3>{{cite Gaia DR3|2161275788716592256}}</ref>
<ref name=Lepine2005>{{citation | 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=. }}</ref>
<ref name=Rodriguez2015>{{citation | display-authors=1 | last1=Rodriguez | first1=David R. | last2=Duchêne | first2=Gaspard | last3=Tom | first3=Henry | last4=Kennedy | first4=Grant M. | last5=Matthews | first5=Brenda | last6=Greaves | first6=Jane | last7=Butner | first7=Harold | title=Stellar multiplicity and debris discs: an unbiased sample | journal=Monthly Notices of the Royal Astronomical Society | volume=449 | issue=3 | pages=3160–3170 | date=May 2015 | doi=10.1093/mnras/stv483 | doi-access=free | arxiv=1503.01320 | bibcode=2015MNRAS.449.3160R | s2cid=119237891 | postscript=. }}</ref>
<ref name=Ligi2016>{{citation | title=Radii, masses, and ages of 18 bright stars using interferometry and new estimations of exoplanetary parameters | last1=Ligi | first1=R. | last2=Creevey | first2=O. | last3=Mourard | first3=D. | last4=Crida | first4=A. | last5=Lagrange | first5=A.-M. | last6=Nardetto | first6=N. | last7=Perraut | first7=K. | last8=Schultheis | first8=M. | last9=Tallon-Bosc | first9=I. | last10=ten Brummelaar | first10=T. | journal=Astronomy & Astrophysics | display-authors=1 | volume=586 | id=A94 | pages=23 | date=February 2016 | postscript=. | doi=10.1051/0004-6361/201527054 | bibcode=2016A&A...586A..94L |arxiv = 1511.03197 | s2cid=15941645 }}</ref>
<ref name=Takeda2007>{{citation | title=Fundamental Parameters and Elemental Abundances of 160 F-G-K Stars Based on OAO Spectrum Database | last=Takeda | first=Yoichi | postscript=. | journal=Publications of the Astronomical Society of Japan | volume=59 | issue=2 | pages=335–356 | date=April 2007 | bibcode=2007PASJ...59..335T | doi=10.1093/pasj/59.2.335 | doi-access=free }}</ref>
<ref name=Takeda2005>{{citation | display-authors=1 | last1=Takeda | first1=Yoichi | last2=Sato | first2=Bun'ei | last3=Kambe | first3=Eiji | last4=Masuda | first4=Seiji | last5=Izumiura | first5=Hideyuki | last6=Watanabe | first6=Etsuji | last7=Ohkubo | first7=Michiko | last8=Yanagisawa | first8=Kenshi | last9=Yasaka | first9=Yoshiro | title=High-Dispersion Spectra Collection of Nearby F-K Stars at Okayama Astrophysical Observatory: A Basis for Spectroscopic Abundance Standards | journal=Publications of the Astronomical Society of Japan | volume=57 | issue=1 | pages=13–25 | date=February 2005 | postscript=. | bibcode=2005PASJ...57...13T | doi=10.1093/pasj/57.1.13 | doi-access= }}</ref> </references>
{{Stars of Draco}}
[[Category:F-type main-sequence stars]] [[Category:M-type main-sequence stars]] [[Category:Draco (constellation)]] [[Category:Durchmusterung objects|BD+64 1252]] [[Category:Flamsteed objects|Draconis, 36]] [[Category:Gliese and GJ objects|9619]] [[Category:Henry Draper Catalogue objects|168151]] [[Category:Hipparcos objects|089348]] [[Category:Bright Star Catalogue objects|6850]]