{{Short description| Binary star in the constellation Vela}} {{Starbox begin}} {{Starbox image | image= {{Location mark | image=Vela IAU.svg | float=center | width=250 | position=right | mark=Red circle.svg | mark_width=10 | mark_link=ψ Vel | x%=52.8 | y%=32.2 }} | caption=Location of ψ Velorum }} {{Starbox observe | epoch = J2000.0 | equinox = J2000.0 (ICRS) | constell = Vela | ra = {{RA|09|30|41.99958}}<ref name=vanLeeuwen2007/> | dec = {{DEC|−40|28|00.2616}}<ref name=vanLeeuwen2007/> | appmag_v = +3.58<ref name=Mermilliod1986/> {{nowrap|(3.91 + 5.12)}}<ref name=Malkov2012/> }} {{Starbox character | type = Main sequence<ref name=kaler/> | class = {{nowrap|F0 IV + F3 IV}}<ref name=Heiter2015/> | b-v = +0.36<ref name=Mermilliod1986/> | u-b = +0.00<ref name=Mermilliod1986/> | r-i = | variable = }} {{Starbox astrometry | radial_v = {{Val|+8.8|1.8}}<ref name=deBruijne2012/> | prop_mo_ra = −147.98<ref name=vanLeeuwen2007/> | prop_mo_dec = +61.35<ref name=vanLeeuwen2007/> | parallax = 53.15 | p_error = 0.37 | parallax_footnote = <ref name=vanLeeuwen2007/> | absmag_v = 2.56<ref name=Just2008/> }} {{Starbox orbit | reference = <ref name=Mason2023/> | period = {{Val|34.11|0.12}} | axis = {{Val|0.8110|0.0017}} | eccentricity = {{Val|0.4375|0.0030}} | inclination = {{Val|58.45|0.15}} | node = {{Val|288.24|0.13}} | periastron = {{Val|2004.062|0.035|fmt=none}} | periarg = {{Val|47.76|0.53}} }} {{Starbox detail | source = <ref name=Meunier2022/> | component1 = ψ Vel A | mass = 1.46 | radius = {{solar radius calculator|type=LT|4.21|6837|decimals=2}}{{Efn|name=radius}} | luminosity = 4.21 | temperature = 6,837 | metal_fe = {{Val|0.0|0.2}}<ref name=Heiter2015/> | component2 = ψ Vel B | mass2 = 1.34 | radius2 = {{solar radius calculator|type=LT|3.05|6148|decimals=2}}{{Efn|name=radius}} | luminosity2 = 3.05 | temperature2 = 6,148 | metal_fe2 = {{Val|0.0|0.2}}<ref name=Heiter2015/> }} {{Starbox catalog | names = {{odlist | B=ψ Vel | CD=−39°5580 | GJ=351 | HD=82434 | HIP=46651 | HR=3786 | SAO=221234 | WDS=J09307-4028AB }}<ref name=SIMBAD/> }} {{Starbox reference | Simbad = psi+Vel | sn=ψ Vel | Simbad2 = psi+Vel+A | sn2=ψ Vel A | Simbad3 = psi+Vel+B | sn3=ψ Vel B | ARICNS = 00734 | an=ψ Vel A | ARICNS2 = 00735 | an2=ψ Vel B }} {{Starbox end}}
'''Psi Velorum''', Latinized from ψ Velorum, is a binary star system in the southern constellation of Vela. Based upon an annual parallax shift of 53.15 mas as seen from Earth, it is located 61.4 light years from the Sun. It is visible to the naked eye with a combined apparent visual magnitude of +3.58.<ref name=Mermilliod1986/> The motion of this system through space makes it a candidate member of the Castor stellar kinematic group.<ref name=Nakajima2010/>
The two components of this system orbit their common barycenter with a period of 34.11 years and an eccentricity of 0.4375. The semimajor axis of their orbit has an angular size of 0.8110 arc seconds.<ref name=Mason2023/> Psi Velorum A and Psi Velorum B have apparent magnitudes of +3.91 and +5.12<ref name=Malkov2012/> and spectral types F0 IV and F3 IV, suggesting they are F-type subgiants.<ref name=Heiter2015/> Analysis of the stars' properties suggest that they are main sequence stars rather than subgiants,<ref name=kaler/> and spectral types of F3V + F have also been published.<ref name=Meunier2022/> The secondary has been reported to be variable between magnitude 4.5 and 5.1.<ref name=gcvs/>
==Notes== {{notelist|notes=
{{Efn|name=radius|1=Calculated, using the Stefan-Boltzmann law and the stars' effective temperature and luminosity, with respect to the solar nominal effective temperature of {{val|fmt=commas|5,772|ul=K}}:<math display="block">\sqrt{\biggl(\frac{5,772}{6,837}\biggr)^4 \cdot 4.21} = 1.46\ R_\odot.</math><math display="block">\sqrt{\biggl(\frac{5,772}{6,148}\biggr)^4 \cdot 3.05} = 1.54\ R_\odot.</math>}}
}}
==References== <references> <ref name=kaler>{{Citation |title=Psi Velorum |url=http://stars.astro.illinois.edu/sow/psivel.html |access-date=2025-01-17 |website=stars.astro.illinois.edu}}</ref>
<ref name=vanLeeuwen2007>{{citation | title=Validation of the new Hipparcos reduction | last1=van Leeuwen | first1=F. | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | date=2007 | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | s2cid=18759600 | postscript=. }}</ref>
<ref name=Mason2023>{{Citation |last1=Mason |first1=Brian D. |last2=Tokovinin |first2=Andrei |last3=Mendez |first3=Rene A. |last4=Costa |first4=Edgardo |date=October 2023 |title=Speckle Interferometry at SOAR in 2022 |bibcode=2023AJ....166..139M |journal=The Astronomical Journal |language=en |volume=166 |issue=4 |pages=139 |doi=10.3847/1538-3881/acedaf |doi-access=free |issn=0004-6256}}.</ref>
<ref name=Malkov2012>{{citation | last1=Malkov | first1=O. Yu. | last2=Tamazian | first2=V. S. | last3=Docobo | first3=J. A. | last4=Chulkov | first4=D. A. | title=Dynamical Masses of a Selected Sample of Orbital Binaries | journal=Astronomy & Astrophysics | display-authors=1 | volume=546| id=A69 | pages=5 | date=2012 | postscript=. | doi=10.1051/0004-6361/201219774 | bibcode =2012A&A...546A..69M | doi-access=free }}</ref>
<ref name=deBruijne2012>{{citation | last1=de Bruijne | first1=J. H. J. | last2=Eilers | first2=A.-C. | title=Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project | journal=Astronomy & Astrophysics | volume=546 | id=A61 | pages=14 | date=October 2012 | doi=10.1051/0004-6361/201219219 | bibcode=2012A&A...546A..61D | arxiv=1208.3048 | s2cid=59451347 | postscript=. }}</ref>
<ref name=Meunier2022>{{Citation |last1=Meunier |first1=N. |last2=Lagrange |first2=A.-M. |date=2022-03-01 |title=A new estimation of astrometric exoplanet detection limits in the habitable zone around nearby stars |journal=Astronomy & Astrophysics |language=en |volume=659 |pages=A104 |doi=10.1051/0004-6361/202142702 |doi-access=free |bibcode=2022A&A...659A.104M |issn=0004-6361|arxiv=2202.06301 }}</ref>
<ref name=Nakajima2010>{{citation | display-authors=1 | last1=Nakajima | first1=Tadashi | last2=Morino | first2=Jun-Ichi | last3=Fukagawa | first3=Misato | title=Potential Members of Stellar Kinematical Groups within 20 pc of the Sun | journal=The Astronomical Journal | postscript=. | volume=140 | issue=3 | pages=713–722 |date=September 2010 | doi=10.1088/0004-6256/140/3/713 | bibcode=2010AJ....140..713N | doi-access=free }}</ref>
<ref name=Just2008>{{citation | title=The main sequence from F to K stars of the solar neighbourhood in SDSS colours | last1=Just | first1=A. | last2=Jahrei | first2=H. | journal=Astronomische Nachrichten | postscript=. | volume=329 | issue=8 | page=790 | date=October 2008 | doi=10.1002/asna.200811030 | bibcode=2008AN....329..790J |arxiv = 0808.2111 | s2cid=18793369 }}</ref>
<ref name=Heiter2015>{{citation | title=Gaia FGK benchmark stars: Effective temperatures and surface gravities | journal=Astronomy & Astrophysics | display-authors=1 | last1=Heiter | first1=U. | last2=Jofré | first2=P. | last3=Gustafsson | first3=B. | last4=Korn | first4=A. J. | last5=Soubiran | first5=C. | last6=Thévenin | first6=F. | volume=582 | pages=A49 | year=2015 | doi=10.1051/0004-6361/201526319 | bibcode=2015A&A...582A..49H | arxiv=1506.06095 | s2cid=53391939 | postscript=. }}</ref>
<ref name=Mermilliod1986>{{citation | last1=Mermilliod | first1=J.-C. | title=Compilation of Eggen's UBV data, transformed to UBV (unpublished) | journal=Catalogue of Eggen's UBV Data | year=1986 | publisher=SIMBAD | bibcode=1986EgUBV........0M | postscript=. }}</ref>
<ref name=gcvs>{{citation | display-authors=etal | last1=Samus | first1=N. N. | last2=Durlevich | first2=O. V. | title=VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013) | journal=VizieR On-line Data Catalog: B/gcvs | volume=1 | year=2009 | postscript=. | bibcode=2009yCat....102025S }}</ref>
<ref name=SIMBAD>{{cite simbad | title=* psi Vel | access-date=2017-03-31 | postscript=. }}</ref> </references>
{{Stars of Vela|state=collapsed}}
<!-- Properties -->
Category:F-type subgiants Category:Suspected variables Category:Binary stars <!-- Other --> Category:Vela (constellation) Velorum, Psi Category:Durchmusterung objects 0351 082434 046651 3786