# 36 Draconis

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Star in the constellation Draco

36 Draconis Location of 36 Draconis (circled in red) Observation data Epoch J2000 Equinox Constellation Draco Right ascension 18h 13m 53.83281s[1] Declination +64° 23′ 50.2258″[1] Apparent magnitude (V) 4.99[2] Characteristics Evolutionary stage main sequence[1] Spectral type F5 V[3] + M3[4] B−V color index +0.40[3] Astrometry Radial velocity (Rv) −35.6[3] km/s Proper motion (μ) RA: +352.918[1] mas/yr Dec.: +355.572[1] mas/yr Parallax (π) 43.1837±0.0940 mas[1] Distance 75.5 ± 0.2 ly (23.16 ± 0.05 pc) Absolute magnitude (MV) 3.14[3] + 7.4[4] Details[2] Mass 1.23±0.15 M☉ Radius 1.635±0.037 R☉ Luminosity 4.66±0.12 L☉ Surface gravity (log g) 4.1±0.5 cgs Temperature 6,638±83 K Metallicity [Fe/H] −0.3±0.1 dex Rotational velocity (v sin i) 8[3] km/s Age 2.95[5] Gyr Other designations 36 Dra, BD+64°1252, FK5 685, GJ 9619, HD 168151, HIP 89348, HR 6850, SAO 17828[6] Database references SIMBAD data

**36 Draconis** is a [star](/source/Star) in the northern [constellation](/source/Constellation) [Draco](/source/Draco_(constellation)). It is faintly visible to the naked eye with an [apparent visual magnitude](/source/Apparent_visual_magnitude) of 4.99.[2] Based upon an annual [parallax shift](/source/Stellar_parallax) of 43.18 [mas](/source/Milliarcsecond), it is located about 75.5 [light years](/source/Light_year) away. At that distance, the visual magnitude is diminished by an [extinction](/source/Extinction_(astronomy)) of 0.129 due to [interstellar dust](/source/Interstellar_dust).[2] The star has a relatively high [proper motion](/source/Proper_motion), traversing the [celestial sphere](/source/Celestial_sphere) at the rate of 0.353 [arc seconds](/source/Arc_second) per year.[7] It is moving closer to the Sun with a [radial velocity](/source/Radial_velocity) of −35.6 km/s.[3]

36 Draconis captured by the [Euclid Space Telescope](/source/Euclid_Space_Telescope)

This is an ordinary [F-type main-sequence star](/source/F-type_main-sequence_star) with a [stellar classification](/source/Stellar_classification) of F5 V.[3] It has 1.23 times the [mass of the Sun](/source/Mass_of_the_Sun) and 1.64 times the [Sun's radius](/source/Sun's_radius).[2] The star is around three[5] billion years old and is spinning with a [projected rotational velocity](/source/Projected_rotational_velocity) of 8 km/s.[3] It is radiating 4.7 times the [Sun's luminosity](/source/Sun's_luminosity) from its [photosphere](/source/Photosphere) at an [effective temperature](/source/Effective_temperature) of 6,638 K.[2]

Observations carried out in 2010 and 2012 detected a faint companion at an [angular separation](/source/Angular_separation) of 3.3 [arcseconds](/source/Arcsecond). Judging by the age and magnitude, this is a [red dwarf](/source/Red_dwarf) of class M3.[4]

## References

1. ^ [***a***](#cite_ref-dr3_1-0) [***b***](#cite_ref-dr3_1-1) [***c***](#cite_ref-dr3_1-2) [***d***](#cite_ref-dr3_1-3) [***e***](#cite_ref-dr3_1-4) [***f***](#cite_ref-dr3_1-5) Vallenari, A.; et al. (Gaia collaboration) (2023). ["*Gaia* Data Release 3. Summary of the content and survey properties"](https://doi.org/10.1051%2F0004-6361%2F202243940). *Astronomy and Astrophysics*. **674**: A1. [arXiv](/source/ArXiv_(identifier)):[2208.00211](https://arxiv.org/abs/2208.00211). [Bibcode](/source/Bibcode_(identifier)):[2023A&A...674A...1G](https://ui.adsabs.harvard.edu/abs/2023A&A...674A...1G). [doi](/source/Doi_(identifier)):[10.1051/0004-6361/202243940](https://doi.org/10.1051%2F0004-6361%2F202243940). [S2CID](/source/S2CID_(identifier)) [244398875](https://api.semanticscholar.org/CorpusID:244398875). [Gaia DR3 record for this source](https://vizier.cds.unistra.fr/viz-bin/VizieR-4?-source=+I%2F355&-from=nav&-nav=cat%3AI%2F355%26tab%3A%7BI%2F355%2Fgaiadr3%7D%26key%3Asource%3D1355%2Fgaiadr3%26HTTPPRM%3A%26-out.add%3D.%26Source%3D%3D%3D2161275788716592256%26-go+%25%23Sesame%23%25%26) at [VizieR](/source/VizieR).

1. ^ [***a***](#cite_ref-Ligi2016_2-0) [***b***](#cite_ref-Ligi2016_2-1) [***c***](#cite_ref-Ligi2016_2-2) [***d***](#cite_ref-Ligi2016_2-3) [***e***](#cite_ref-Ligi2016_2-4) [***f***](#cite_ref-Ligi2016_2-5) Ligi, R.; et al. (February 2016), "Radii, masses, and ages of 18 bright stars using interferometry and new estimations of exoplanetary parameters", *Astronomy & Astrophysics*, **586**: 23, [arXiv](/source/ArXiv_(identifier)):[1511.03197](https://arxiv.org/abs/1511.03197), [Bibcode](/source/Bibcode_(identifier)):[2016A&A...586A..94L](https://ui.adsabs.harvard.edu/abs/2016A&A...586A..94L), [doi](/source/Doi_(identifier)):[10.1051/0004-6361/201527054](https://doi.org/10.1051%2F0004-6361%2F201527054), [S2CID](/source/S2CID_(identifier)) [15941645](https://api.semanticscholar.org/CorpusID:15941645), A94.

1. ^ [***a***](#cite_ref-Takeda2005_3-0) [***b***](#cite_ref-Takeda2005_3-1) [***c***](#cite_ref-Takeda2005_3-2) [***d***](#cite_ref-Takeda2005_3-3) [***e***](#cite_ref-Takeda2005_3-4) [***f***](#cite_ref-Takeda2005_3-5) [***g***](#cite_ref-Takeda2005_3-6) [***h***](#cite_ref-Takeda2005_3-7) Takeda, Yoichi; et al. (February 2005), "High-Dispersion Spectra Collection of Nearby F-K Stars at Okayama Astrophysical Observatory: A Basis for Spectroscopic Abundance Standards", *Publications of the Astronomical Society of Japan*, **57** (1): 13–25, [Bibcode](/source/Bibcode_(identifier)):[2005PASJ...57...13T](https://ui.adsabs.harvard.edu/abs/2005PASJ...57...13T), [doi](/source/Doi_(identifier)):[10.1093/pasj/57.1.13](https://doi.org/10.1093%2Fpasj%2F57.1.13).

1. ^ [***a***](#cite_ref-Rodriguez2015_4-0) [***b***](#cite_ref-Rodriguez2015_4-1) [***c***](#cite_ref-Rodriguez2015_4-2) Rodriguez, David R.; et al. (May 2015), "Stellar multiplicity and debris discs: an unbiased sample", *Monthly Notices of the Royal Astronomical Society*, **449** (3): 3160–3170, [arXiv](/source/ArXiv_(identifier)):[1503.01320](https://arxiv.org/abs/1503.01320), [Bibcode](/source/Bibcode_(identifier)):[2015MNRAS.449.3160R](https://ui.adsabs.harvard.edu/abs/2015MNRAS.449.3160R), [doi](/source/Doi_(identifier)):[10.1093/mnras/stv483](https://doi.org/10.1093%2Fmnras%2Fstv483), [S2CID](/source/S2CID_(identifier)) [119237891](https://api.semanticscholar.org/CorpusID:119237891).

1. ^ [***a***](#cite_ref-Takeda2007_5-0) [***b***](#cite_ref-Takeda2007_5-1) Takeda, Yoichi (April 2007), "Fundamental Parameters and Elemental Abundances of 160 F-G-K Stars Based on OAO Spectrum Database", *Publications of the Astronomical Society of Japan*, **59** (2): 335–356, [Bibcode](/source/Bibcode_(identifier)):[2007PASJ...59..335T](https://ui.adsabs.harvard.edu/abs/2007PASJ...59..335T), [doi](/source/Doi_(identifier)):[10.1093/pasj/59.2.335](https://doi.org/10.1093%2Fpasj%2F59.2.335).

1. **[^](#cite_ref-SIMBAD_6-0)** ["36 Dra"](http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=36+Dra). *[SIMBAD](/source/SIMBAD)*. [Centre de données astronomiques de Strasbourg](/source/Centre_de_donn%C3%A9es_astronomiques_de_Strasbourg). Retrieved 2018-01-27.

1. **[^](#cite_ref-Lepine2005_7-0)** Lépine, Sébastien; Shara, Michael M. (March 2005), "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)", *The Astronomical Journal*, **129** (3): 1483–1522, [arXiv](/source/ArXiv_(identifier)):[astro-ph/0412070](https://arxiv.org/abs/astro-ph/0412070), [Bibcode](/source/Bibcode_(identifier)):[2005AJ....129.1483L](https://ui.adsabs.harvard.edu/abs/2005AJ....129.1483L), [doi](/source/Doi_(identifier)):[10.1086/427854](https://doi.org/10.1086%2F427854), [S2CID](/source/S2CID_(identifier)) [2603568](https://api.semanticscholar.org/CorpusID:2603568).

v t e Constellation of Draco List of stars in Draco Draco in Chinese astronomy Stars Bayer α (Thuban) β (Rastaban) γ (Eltanin) δ (Altais) ε (Tyl) ζ (Aldhibah) η (Athebyne) θ ι (Edasich) κ λ (Giausar) μ (Alrakis) ν (Kuma) ξ (Grumium) ο π ρ σ (Alsafi) τ υ φ χ ψ1 (Dziban) ψ2 ω Flamsteed 4 6 7 (Tianyi) 8 (Taiyi) 10 (i) 15 (A) 18 (g) 19 (h) 26 36 39 (b) 42 (Fafnir) 45 (d) 50 59 64 (e) 68 Variable TW YY AG BY CL CM CX DO EK HP V581 HR 3751 4126 4934 5811 6237 6518 6618 (Alruba) 6817 7137 7783 HD 109246 (Funi) 101364 128717 147379 156279 158259 176693 191939 Other 2MASS 1237+6526 2MASS J17554042+6551277 G 240-72 GD 356 Gliese 420 Gliese 625 Gliese 687 GRW +70 8247 Kepler-4 Kepler-10 Kepler-12 Kepler-90 Kepler-296 KOI-256 LP 71-82 Qatar-1 SDSS J1240+6710 Struve 2398 TOI-1136 WD 1856+534 WISE 1647+5632 WISE 1841+7000 Exoplanets HD 139357 b HD 167042 b ι Dra b (Hypatia) Kepler-4b Kepler-10b c Kepler-12b Kepler-90e f g h i Kepler-296b c d e f TOI-1452 b TrES-2b Star clusters LAMOST 1 Nebulae Cat's Eye Nebula NGC 6742 Galaxies NGC 3147 3197 3735 4121 4125 4221 4236 4319 4331 4332 4363 4441 4513 4545 4589 5678 5777 5866 5866B 5879 5905 5907 5949 5963 5965 5982 5985 6090 6248 6285 6286 6338 6340 6365 6373 6394 6412 6503 6505 6566 6621 6622 6670 6676 6786 6789 Other 1ES 1927+654 1ES 1959+650 3C 249.1 3C 305 3C 319 3C 343 3C 343.1 3C 351 3C 356 3C 371 3C 380 3C 390.3 3C 401 4C +72.26 4C 73.08 8C 1241+735 Abell 2218 BCG Bean galaxy Beaver galaxy BZQ J1727+5510 Draco Dwarf Draco II GB 1508+5714 Goldfish galaxy H1821+643 HFLS3 IERS B1946+708 IRAS F17179+5444 IRAS 18580+6527 J120011.1+680924.8 KKR 25 Markarian 817 Markarian 876 Original TRG PGC 39058 Porphyrion QSO B1823+568 RGZ J172749.5+534647 S5 1803+784 S5 2007+777 SDSS J1715+6008 Tadpole Galaxy UGC 9391 UGC 9405 UGC 11241 UGC 11411 WISEA J145223.62+611707.5 WN B1851+5707 Galaxy clusters Abell 2218 CL1358+62 Draco Supercluster NGC 5866 Group Astronomical events SN 2003jb SN 2005B SN 2016aps Swift J1644+57 Category

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Adapted from the Wikipedia article [36 Draconis](https://en.wikipedia.org/wiki/36_Draconis) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/36_Draconis?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.