Psi Velorum

{{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}}

| dec = {{DEC|−40|28|00.2616}}

| appmag_v = +3.58 {{nowrap|(3.91 + 5.12)}}

}}

{{Starbox character

| type = Main sequence or subgiant

| class = {{nowrap|F0 IV + F3 IV}}

| b-v = +0.36

| u-b = +0.00

| r-i =

| variable =

}}

{{Starbox astrometry

| radial_v = {{Val|+8.8|1.8}}

| prop_mo_ra = −147.98

| prop_mo_dec = +61.35

| parallax = 53.15

| p_error = 0.37

| parallax_footnote =

| absmag_v = 2.56

}}

{{Starbox orbit

| reference =

| period = 33.95

| axis = 0.862

| eccentricity = 0.433

| inclination = 58.0

| node = 291.0

| periastron = 1969.68

| periarg = 44.3

}}

{{Starbox detail

| source =

| 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}}

| 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}}

}}

{{Starbox catalog

| names = {{odlist | B=ψ Vel | CD=−39°5580 | GJ=351 | HD=82434 | HIP=46651 | HR=3786 | SAO=221234 | WDS=J09307-4028AB }}

}}

{{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

}}

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. The motion of this system through space makes it a candidate member of the Castor stellar kinematic group.

The two components of this system orbit their common barycenter with a period of 33.95 years and an eccentricity of 0.433. The semimajor axis of their orbit has an angular size of 0.862 arc seconds. Psi Velorum A and Psi Velorum B have apparent magnitudes of +3.91 and +5.12 and spectral types F0 IV and F3 IV, suggesting they are F-type subgiants. Analysis of the stars' properties suggest that they are main sequence stars rather than subgiants, and spectral types of F3V + F have also been published. The secondary has been reported to be variable between magnitude 4.5 and 5.1.

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}}: $\sqrt{\biggl(\frac{5,772}{6,837}\biggr)^4 \cdot 4.21} = 1.46\ R_\odot.$ $\sqrt{\biggl(\frac{5,772}{6,148}\biggr)^4 \cdot 3.05} = 1.54\ R_\odot.$ }}

}}

References

{{reflist|refs=

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