p Velorum

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[1] mas
Distance	87.5 ± 0.8 ly ; (26.8 ± 0.3 pc)
Absolute magnitude (MV)	2.15 / 2.70 / 2.14[2]
Orbit[3]
Primary	p Vel A
Companion	p 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[2]
p Vel Aa
Mass	2.13 M☉
p Vel Ab
Mass	1.81 M☉
p Vel B
Mass	2.41 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]

References

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.
Evans, D. S. (1969). "A Rediscussion of p Velorum". Monthly Notices of the Royal Astronomical Society. 142 (4): 523. Bibcode:1969MNRAS.142..523E. doi:10.1093/mnras/142.4.523.
"Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory.
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.

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[HIP-1] 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.

[Evans-2] Evans, D. S. (1969). "A Rediscussion of p Velorum". Monthly Notices of the Royal Astronomical Society. 142 (4): 523. Bibcode:1969MNRAS.142..523E. doi:10.1093/mnras/142.4.523.

[ORB6-3] "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory.

[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.