Astronomy:P Velorum
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Short description: Triple star system in the constellation Vela
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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[5] | |
| p Vel Aa | |
| Mass | 1.88 M☉ |
| Radius | 2.56[lower-alpha 1] R☉ |
| Luminosity | 12.5 L☉ |
| Temperature | 6,710 K |
| p Vel Ab | |
| Mass | 1.29 M☉ |
| Radius | 1.22[lower-alpha 1] R☉ |
| Luminosity | 2.79 L☉ |
| Temperature | 6,740 K |
| p Vel B | |
| Mass | 2.41[2] M☉ |
| Other designations | |
| 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
- ↑ 1.0 1.1 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
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V. http://www.aanda.org/index.php?option=com_article&access=bibcode&Itemid=129&bibcode=2007A%2526A...474..653VFUL.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Evans, D. S. (1969). "A Rediscussion of p Velorum". Monthly Notices of the Royal Astronomical Society 142 (4): 523–541. doi:10.1093/mnras/142.4.523. Bibcode: 1969MNRAS.142..523E.
- ↑ 3.0 3.1 3.2 3.3 "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory. http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/wds/orb6.
- ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. Bibcode: 2006AstL...32..759G.
- ↑ 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. doi:10.1093/mnras/sts257. ISSN 0035-8711. Bibcode: 2013MNRAS.428.3104E.
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