{{Short description|Star in the constellation Centaurus}} {{Starbox begin}} {{Starbox observe | epoch = J2000 | ra = {{RA|14|19|04.83414}}<ref name=GaiaDR2/> | dec = {{DEC|−59|22|44.5272}}<ref name=GaiaDR2/> | appmag_v = 6.637<ref name=cgssn09/> | constell = [[Centaurus]] }} {{Starbox character | class = K3&nbsp;IV<ref name=aj132_1_161/> | b-v = +1.025<ref name="MERMILLIOD"/> | u-b = +0.905<ref name="MERMILLIOD"/> | variable = }} {{Starbox astrometry | radial_v = −14.9<ref name=rgcrv/> | prop_mo_ra = −454.895<ref name=GaiaDR2/> | prop_mo_dec = −810.729<ref name=GaiaDR2/> | parallax = 84.4535 | p_error = 0.0349 | parallax_footnote = <ref name=GaiaDR2/> | absmag_v = 6.28<ref name=cgssn09/> }} {{Starbox detail | mass = {{val|0.806|0.017}}<ref name=aa_555_A150/> | radius = {{val|0.83|0.02|0.01}}<ref name=GaiaDR2/> | luminosity = {{val|0.347|0.001}}<ref name=GaiaDR2/> | temperature = {{val|4858|47|59|fmt=commas}}<ref name=GaiaDR2/> | gravity = 4.48<ref name=aj132_1_161/> | metal_fe = −0.70<ref name=aaa348/> | rotational_velocity = 3.97<ref name=aaa520_A79/> | age_gyr = 9.98<ref name=aaa348/> }} {{Starbox catalog | names = {{odlist | | CD=-58°5564 | GJ=542 | HD=125072 | HIP=69972 | LHS=2892 | LTT=5625 | SAO=241627 }}<ref name=SIMBAD/> }} {{Starbox reference | Simbad=HD+125072 }} {{Starbox end}}

'''HD 125072''' is a [[star]] in the southern [[constellation]] of [[Centaurus]]. It is a challenge to view with the naked eye, having an [[apparent visual magnitude]] of 6.637.<ref name=cgssn09/> The star is located at a distance of 38.6&nbsp;[[light year]]s from the Sun based on [[stellar parallax|parallax]].<ref name=GaiaDR2/> It is drifting closer with a [[radial velocity]] of −14.9&nbsp;km/s.<ref name=rgcrv/> The components of the [[Space velocity (astronomy)|space velocity]] for this star are U=&minus;18.5, V=&minus;6.9 and W=&minus;26.9&nbsp;km/s.<ref name=aaa348/>

The [[stellar classification]] of this star is K3&nbsp;IV,<ref name=aj132_1_161/> matching a [[K-type star|K-type]] [[subgiant]] that is evolving into a [[giant star|giant]]. It has 81%<ref name=aa_555_A150/> of the [[Sun's mass]] and 83%<ref name=GaiaDR2/> of the [[radius of the Sun]]. The star is radiating 34.7% of the [[Sun's luminosity]] from its [[photosphere]] at an [[effective temperature]] of 4,858&nbsp;K.<ref name=GaiaDR2/> Based on the composition and kinematics of this star, it has an estimated age of about 10 billion years.<ref name=aaa348/> It is spinning with a [[projected rotational velocity]] of 4&nbsp;km/s.<ref name=aaa520_A79/>

==References== {{Reflist|refs=

<ref name=GaiaDR2>{{Cite Gaia DR2|5866992641380992256}}</ref>

<ref name=SIMBAD>{{cite simbad | title=HD 125072 | access-date=2020-11-08 }}</ref>

<ref name=aj132_1_161>{{citation | display-authors=1 | last1=Gray | first1=R. O. | last2=Corbally | first2=C. J. | last3=Garrison | first3=R. F. | last4=McFadden | first4=M. T. | last5=Bubar | first5=E. J. | last6=McGahee | first6=C. E. | last7=O'Donoghue | first7=A. A. | last8=Knox | first8=E. R. | title=Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample | journal=[[The Astronomical Journal]] | volume=132 | issue=1 | pages=161–170 | date=July 2006 | doi=10.1086/504637 | bibcode=2006AJ....132..161G | arxiv=astro-ph/0603770 | s2cid=119476992 }}</ref>

<ref name=aaa348>{{cite journal | display-authors=1 | last1=Lachaume | first1=R. | last2=Dominik | first2=C. | last3=Lanz | first3=T. | last4=Habing | first4=H. J. | title=Age determinations of main-sequence stars: combining different methods | journal=Astronomy and Astrophysics | date=1999 | volume=348 | pages=897–909 | bibcode=1999A&A...348..897L }}</ref>

<ref name=cgssn09>{{citation | last1=Holmberg | first1=J. | last2=Nordström | first2=B. | last3=Andersen | first3=J. | title=The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics | journal=Astronomy and Astrophysics | volume=501 | issue=3 |date=July 2009 | pages=941–947 | doi=10.1051/0004-6361/200811191 | bibcode=2009A&A...501..941H | arxiv=0811.3982 | s2cid=118577511 }}</ref>

<ref name=rgcrv>{{citation | last=Evans | first=D. S. | date=June 20–24, 1966 | editor1-last=Batten | editor1-first=Alan Henry | editor2-last=Heard | editor2-first=John Frederick | contribution=The Revision of the General Catalogue of Radial Velocities | title=Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30 | volume=30 | page=57 | location=University of Toronto | publisher=[[International Astronomical Union]] | bibcode=1967IAUS...30...57E }}</ref>

<ref name=aaa520_A79>{{cite journal | display-authors=1 | last1=Martínez-Arnáiz | first1=R. | last2=Maldonado | first2=J. | last3=Montes | first3=D. | last4=Eiroa | first4=C. | last5=Montesinos | first5=B. | title=Chromospheric activity and rotation of FGK stars in the solar vicinity. An estimation of the radial velocity jitter | journal=Astronomy and Astrophysics | volume=520 | page=A79 | date=September 2010 | doi=10.1051/0004-6361/200913725 | bibcode=2010A&A...520A..79M | arxiv=1002.4391 | s2cid=43455849 | url=http://eprints.ucm.es/37826/1/davidmontes17libre.pdf | access-date=2018-11-04 | archive-date=2017-09-22 | archive-url=https://web.archive.org/web/20170922031257/http://eprints.ucm.es/37826/1/davidmontes17libre.pdf | url-status=dead }}</ref>

<ref name=aa_555_A150>{{citation | display-authors=1 | last1=Tsantaki | first1=M. | last2=Sousa | first2=S. G. | last3=Adibekyan | first3=V. Zh. | last4=Santos | first4=N. C. | last5=Mortier | first5=A. | last6=Israelian | first6=G. | title=Deriving precise parameters for cool solar-type stars. Optimizing the iron line list | journal=Astronomy & Astrophysics | volume=555 | page=A150 | date=July 2013 | doi=10.1051/0004-6361/201321103 | bibcode=2013A&A...555A.150T | arxiv=1304.6639 | s2cid=118388752 | postscript=. }}</ref>

<ref name="MERMILLIOD">{{citation | last1=Mermilliod | first1=J.-C. | title=Compilation of Eggen's UBV data, transformed to UBV (unpublished) | journal=Catalogue of Eggen's UBV Data. SIMBAD | date=1986 | bibcode=1986EgUBV........0M }}</ref>

}}

{{Stars of Centaurus}}

[[Category:K-type subgiants]] [[Category:Centaurus]] [[Category:Durchmusterung objects]] [[Category:Gliese and GJ objects|0542]] [[Category:Henry Draper Catalogue objects|125072]] [[Category:Hipparcos objects|069972]]