P Velorum

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p Velorum
Observation data
Epoch J2000        Equinox J2000
Constellation Vela
Right ascension 10h 37m 18.13995s [1]
Declination −48° 13′ 32.2349″ [1]
Apparent magnitude  (V)3.83 [2] (4.13 / 5.76) [3]
Characteristics
Spectral type F3IV + F0V + A6V [2]
U−B color index +0.04 [2]
B−V color index +0.31 [2]
Astrometry
Radial velocity (Rv)21.20 ± 0.7 [4] km/s
Proper motion (μ)RA: -133.41 [1] mas/yr
Dec.: -1.82 [1] mas/yr
Parallax (π)37.26±0.36  mas [1]
Distance 87.5 ± 0.8  ly
(26.8 ± 0.3  pc)
Absolute magnitude  (MV)2.15 / 2.70 / 2.14 [2]
Orbit [3]
Primaryp Vel A
Companionp Vel B
Period (P)16.651 yr
Semi-major axis (a)0.361″
Eccentricity (e)0.726
Inclination (i)128.5°
Longitude of the node (Ω)37.2°
Periastron epoch (T)2019.562
Argument of periastron (ω)
(secondary)		288.9°
Details [5]
p Vel Aa
Mass 1.88  M☉
Radius 2.56 [a]   R☉
Luminosity 12.5  L☉
Temperature 6,710  K
p Vel Ab
Mass 1.29  M☉
Radius 1.22 [a]   R☉
Luminosity2.79  L☉
Temperature 6,740  K
p Vel B
Mass 2.41 [2]   M☉
Other designations
CD−47°6042, HIP 51986, HR 4167, SAO 222199
p Vel A: HD 92139
p Vel B: HD 92140
Database references
SIMBAD data

p Velorum (abbreviated to p Vel) is a triple star system in the constellation Vela. Parallax measurements by the Hipparcos spacecraft put it at a distance of 87.5 light-years, or 26.8 parsecs from Earth. [1] It is visible to the naked eye with a combined apparent magnitude of 3.83. [2]

The primary component is a spectroscopic binary whose components have an orbital period of 10.21 days. The inner spectroscopic binary consists of two F-type stars, a subgiant and a main-sequence star. [2] There is a companion star which is a white A-type main-sequence star, with an apparent magnitude of 5.76. [3] It is separated 0.361 arcseconds from the primary and has an orbital period of 16.651 years. [3]

Notes

  1. 1 2 Calculated, using the Stefan-Boltzmann law and the star's effective temperature and luminosity, with respect to the solar nominal effective temperature of 5,772  K:

References

  1. 1 2 3 4 5 6 van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv: 0708.1752 . Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID   18759600.
  2. 1 2 3 4 5 6 7 8 Evans, D. S. (1969). "A Rediscussion of p Velorum". Monthly Notices of the Royal Astronomical Society. 142 (4): 523–541. Bibcode:1969MNRAS.142..523E. doi: 10.1093/mnras/142.4.523 .
  3. 1 2 3 4 "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory. Archived from the original on 2017-08-01. Retrieved 2017-07-16.
  4. ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv: 1606.08053 . Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID   119231169.
  5. ↑ Eggl, S.; Pilat-Lohinger, E.; Funk, B.; Georgakarakos, N.; Haghighipour, N. (2013-02-01). "Circumstellar habitable zones of binary-star systems in the solar neighbourhood". Monthly Notices of the Royal Astronomical Society. 428 (4): 3104–3113. arXiv: 1210.5411 . Bibcode:2013MNRAS.428.3104E. doi: 10.1093/mnras/sts257 . ISSN   0035-8711.


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