Psi Velorum

Psi Velorum
Location of ψ Velorum
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Vela
Right ascension 09h 30m 41.99958s[1]
Declination −40° 28′ 00.2616″[1]
Apparent magnitude (V) +3.58[2] (3.91 + 5.12)[3]
Characteristics
Spectral type F0 IV + F3 IV[4]
U−B color index +0.00[2]
B−V color index +0.36[2]
Astrometry
Radial velocity (Rv)+8.8±1.8[5] km/s
Proper motion (μ) RA: −147.98[1] mas/yr
Dec.: +61.35[1] mas/yr
Parallax (π)53.15 ± 0.37 mas[1]
Distance61.4 ± 0.4 ly
(18.8 ± 0.1 pc)
Absolute magnitude (MV)2.56[6]
Orbit[7]
Period (P)33.95 yr
Semi-major axis (a)0.862″
Eccentricity (e)0.433
Inclination (i)58.0°
Longitude of the node (Ω)291.0°
Periastron epoch (T)1969.68
Argument of periastron (ω)
(secondary)		44.3°
Details
ψ Vel A
Mass1.44[8] M☉
Radius2.216[9] R☉
Luminosity9.661[9] L☉
Surface gravity (log g)4.27[8] cgs
Temperature7,122±242[8] K
Metallicity [Fe/H]0.0±0.2[4] dex
Rotational velocity (v sin i)156.0[10] km/s
Age889[8] Myr
Other designations
ψ Vel, CD−39°5580, GJ 351, HD 82434, HIP 46651, HR 3786, SAO 221234, WDS J09307-4028AB[11]
Database references
SIMBADψ Vel
ψ Vel A
ψ Vel B
ARICNSψ Vel A
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.[2] The motion of this system through space makes it a candidate member of the Castor stellar kinematic group.[12]

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.[7] The primary, component A, is a yellow-white hued F-type subgiant with an apparent magnitude of +3.91[3] and a stellar classification of F0 IV.[4] The fainter secondary, component B, is also an F-type subgiant of magnitude +5.12[3] and class F3 IV.[4] It has been reported to be variable between magnitude 4.5 and 5.1.[13]

  1. ^ a b c d e Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Mermilliod1986 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Malkov2012 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference Heiter2015 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Just2008 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Hartkopf2006 was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference David2015 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference schofield was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Schroeder2009 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Nakajima2010 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference gcvs was invoked but never defined (see the help page).