# HD 158633

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Star in the constellation Draco

HD 158633 Location of HD 158633 (circled in red) Observation data Epoch J2000 Equinox J2000 Constellation Draco[1] Right ascension 17h 25m 00.09774s[2] Declination +67° 18′ 24.1487″[2] Apparent magnitude (V) 6.44[1] Characteristics Evolutionary stage main sequence[2] Spectral type K0 V[1] U−B color index +0.29[3] B−V color index +0.76[3] Astrometry Radial velocity (Rv) −38.71±0.08[1] km/s Proper motion (μ) RA: −531.749[2] mas/yr Dec.: +4.818[2] mas/yr Parallax (π) 78.1747±0.0226 mas[2] Distance 41.72 ± 0.01 ly (12.792 ± 0.004 pc) Absolute magnitude (MV) 5.89[4] Details Mass 0.729[5] M☉ Radius 0.7891±0.0144[5] R☉ Luminosity 0.4090±0.0040[5] L☉ Surface gravity (log g) 4.80[6] cgs Temperature 5,203±46[5] K Metallicity [Fe/H] −0.43±0.08[7] dex Rotational velocity (v sin i) 3.4[8] km/s Age 4.27[7] Gyr Other designations BD+67°1014, GJ 675, HD 158633, HIP 85235, HR 6518, SAO 17474, LHS 287, LTT 15185[9] Database references SIMBAD data

**HD 158633** is a [main sequence](/source/Main_sequence) star in the northern [constellation](/source/Constellation) of [Draco](/source/Draco_(constellation)). With an [apparent visual magnitude](/source/Apparent_visual_magnitude) of 6.43, this star is a challenge to view with the unaided eye but it can be seen clearly with a small [telescope](/source/Telescope). Based upon [parallax](/source/Stellar_parallax) measurements, it is 42 [light years](/source/Light_year) from the Sun. The star is drifting closer to the Sun with a [radial velocity](/source/Radial_velocity) of −39 km/s,[1] and is predicted to come to within 26.5 ly (8.1 pc) in around 190,400 years.[10]

This is a [K-type main sequence star](/source/K-type_main_sequence_star) with a [spectral classification](/source/Spectral_classification) of K0 V. It has about 79% of the [Sun's radius](/source/Solar_radius) and 73% of the [solar mass](/source/Solar_mass).[5] It is an estimated 4.3 billion years old and is spinning with a [projected rotational velocity](/source/Projected_rotational_velocity) of 3.4 km/s.[8] The star is emitting an [excess of infrared radiation](/source/Infrared_excess) at a wavelength of 70 μm, suggesting the presence of an orbiting [debris disk](/source/Debris_disk).[7] It has a low [metallicity](/source/Metallicity), with only 37% of the Sun's abundance of elements more massive than helium,[7] and has a relatively high [proper motion](/source/Proper_motion).[2]

## References

1. ^ [***a***](#cite_ref-Anderson2012_1-0) [***b***](#cite_ref-Anderson2012_1-1) [***c***](#cite_ref-Anderson2012_1-2) [***d***](#cite_ref-Anderson2012_1-3) [***e***](#cite_ref-Anderson2012_1-4) Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". *[Astronomy Letters](/source/Astronomy_Letters)*. **38** (5): 331. [arXiv](/source/ArXiv_(identifier)):[1108.4971](https://arxiv.org/abs/1108.4971). [Bibcode](/source/Bibcode_(identifier)):[2012AstL...38..331A](https://ui.adsabs.harvard.edu/abs/2012AstL...38..331A). [doi](/source/Doi_(identifier)):[10.1134/S1063773712050015](https://doi.org/10.1134%2FS1063773712050015). [XHIP record for this object](https://vizier.cds.unistra.fr/viz-bin/VizieR-4?-ref=VIZ681510a8389ecb&-out.src=V%2F137D%2FXHIP&-nav=cat%3AV%2F137D%26tab%3A{V%2F137D%2FXHIP}%26key%3Asource%3DV%2F137D%2FXHIP%26HTTPPRM%3A&-source=V%2F137D%2FXHIP&-out=HIP&HIP=85235&-out=Comp&-out=Gr&-out=RAJ2000&-out=DEJ2000&-out=Dist&-out=X&-out=Y&-out=Z&-out=SpType&-out=Simbad&-out=Hpmag&-out=Lum&-out=Cst) at [VizieR](/source/VizieR).

1. ^ [***a***](#cite_ref-GaiaDR3_2-0) [***b***](#cite_ref-GaiaDR3_2-1) [***c***](#cite_ref-GaiaDR3_2-2) [***d***](#cite_ref-GaiaDR3_2-3) [***e***](#cite_ref-GaiaDR3_2-4) [***f***](#cite_ref-GaiaDR3_2-5) [***g***](#cite_ref-GaiaDR3_2-6) 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%3D1637110042813188608%26-go+%25%23Sesame%23%25%26) at [VizieR](/source/VizieR).

1. ^ [***a***](#cite_ref-aaass129_3-0) [***b***](#cite_ref-aaass129_3-1) Hauck, B.; Mermilliod, M. (1998). ["uvbyβ photoelectric photometric catalogue"](https://doi.org/10.1051%2Faas%3A1998195). *Astronomy and Astrophysics Supplement Series*. **129** (3): 431–433. [Bibcode](/source/Bibcode_(identifier)):[1998A&AS..129..431H](https://ui.adsabs.harvard.edu/abs/1998A&AS..129..431H). [doi](/source/Doi_(identifier)):[10.1051/aas:1998195](https://doi.org/10.1051%2Faas%3A1998195).

1. **[^](#cite_ref-Kovtyukh2004_4-0)** Kovtyukh, V. V.; et al. (2004). "A new Böhm-Vitense gap in the temperature range 5560 to 5610 K in the main sequence". *Astronomy and Astrophysics*. **427** (3): 933–936. [arXiv](/source/ArXiv_(identifier)):[astro-ph/0409753](https://arxiv.org/abs/astro-ph/0409753). [Bibcode](/source/Bibcode_(identifier)):[2004A&A...427..933K](https://ui.adsabs.harvard.edu/abs/2004A&A...427..933K). [doi](/source/Doi_(identifier)):[10.1051/0004-6361:20041449](https://doi.org/10.1051%2F0004-6361%3A20041449). [S2CID](/source/S2CID_(identifier)) [204935981](https://api.semanticscholar.org/CorpusID:204935981).

1. ^ [***a***](#cite_ref-apj771_1_40_5-0) [***b***](#cite_ref-apj771_1_40_5-1) [***c***](#cite_ref-apj771_1_40_5-2) [***d***](#cite_ref-apj771_1_40_5-3) [***e***](#cite_ref-apj771_1_40_5-4) Boyajian, Tabetha S.; et al. (July 2013), "Stellar Diameters and Temperatures. III. Main-sequence A, F, G, and K Stars: Additional High-precision Measurements and Empirical Relations", *The Astrophysical Journal*, **771** (1): 31, [arXiv](/source/ArXiv_(identifier)):[1306.2974](https://arxiv.org/abs/1306.2974), [Bibcode](/source/Bibcode_(identifier)):[2013ApJ...771...40B](https://ui.adsabs.harvard.edu/abs/2013ApJ...771...40B), [doi](/source/Doi_(identifier)):[10.1088/0004-637X/771/1/40](https://doi.org/10.1088%2F0004-637X%2F771%2F1%2F40), [S2CID](/source/S2CID_(identifier)) [14911430](https://api.semanticscholar.org/CorpusID:14911430), 40. See Table 3.

1. **[^](#cite_ref-apj131_6-0)** Luck, R. Earle; Heiter, Ulrike (2006). ["Dwarfs in the Local Region"](https://doi.org/10.1086%2F504080). *The Astronomical Journal*. **131** (6): 3069–3092. [Bibcode](/source/Bibcode_(identifier)):[2006AJ....131.3069L](https://ui.adsabs.harvard.edu/abs/2006AJ....131.3069L). [doi](/source/Doi_(identifier)):[10.1086/504080](https://doi.org/10.1086%2F504080).

1. ^ [***a***](#cite_ref-apj652_7-0) [***b***](#cite_ref-apj652_7-1) [***c***](#cite_ref-apj652_7-2) [***d***](#cite_ref-apj652_7-3) Beichman, C. A.; et al. (2006). "New Debris Disks Around Nearby Main-Sequence Stars: Impact on the Direct Detection of Planets". *The Astrophysical Journal*. **652** (2): 1674–1693. [arXiv](/source/ArXiv_(identifier)):[astro-ph/0611682](https://arxiv.org/abs/astro-ph/0611682). [Bibcode](/source/Bibcode_(identifier)):[2006ApJ...652.1674B](https://ui.adsabs.harvard.edu/abs/2006ApJ...652.1674B). [doi](/source/Doi_(identifier)):[10.1086/508449](https://doi.org/10.1086%2F508449). [S2CID](/source/S2CID_(identifier)) [14207148](https://api.semanticscholar.org/CorpusID:14207148).

1. ^ [***a***](#cite_ref-Earle2017_8-0) [***b***](#cite_ref-Earle2017_8-1) Luck, R. Earle (January 2017), "Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants", *The Astronomical Journal*, **153** (1): 19, [arXiv](/source/ArXiv_(identifier)):[1611.02897](https://arxiv.org/abs/1611.02897), [Bibcode](/source/Bibcode_(identifier)):[2017AJ....153...21L](https://ui.adsabs.harvard.edu/abs/2017AJ....153...21L), [doi](/source/Doi_(identifier)):[10.3847/1538-3881/153/1/21](https://doi.org/10.3847%2F1538-3881%2F153%2F1%2F21), [S2CID](/source/S2CID_(identifier)) [119511744](https://api.semanticscholar.org/CorpusID:119511744), 21.

1. **[^](#cite_ref-SIMBAD_9-0)** ["LHS 3287"](http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=LHS+3287). *[SIMBAD](/source/SIMBAD)*. [Centre de données astronomiques de Strasbourg](/source/Centre_de_donn%C3%A9es_astronomiques_de_Strasbourg). Retrieved 2009-04-14.

1. **[^](#cite_ref-Bailer-Jones2018_10-0)** Bailer-Jones, C. A. L. (January 2018), "The completeness-corrected rate of stellar encounters with the Sun from the first Gaia data release", *Astronomy & Astrophysics*, **609**: 16, [arXiv](/source/ArXiv_(identifier)):[1708.08595](https://arxiv.org/abs/1708.08595), [Bibcode](/source/Bibcode_(identifier)):[2018A&A...609A...8B](https://ui.adsabs.harvard.edu/abs/2018A&A...609A...8B), [doi](/source/Doi_(identifier)):[10.1051/0004-6361/201731453](https://doi.org/10.1051%2F0004-6361%2F201731453), [S2CID](/source/S2CID_(identifier)) [119462489](https://api.semanticscholar.org/CorpusID:119462489), A8

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 [HD 158633](https://en.wikipedia.org/wiki/HD_158633) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/HD_158633?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.