HD 72108

Last updated
HD 72108
Observation data
Epoch J2000.0       Equinox J2000.0
Constellation Vela [1]
Right ascension 08h 29m 04.752s [2]
Declination −47° 55′ 44.12″ [2]
Apparent magnitude  (V)+5.33[ citation needed ]
Characteristics
Spectral type B2IV + B2IV [3]
Astrometry
Radial velocity (Rv)29.00±3.7 [4] km/s
Proper motion (μ)RA: −6.90±0.43 [2] mas/yr
Dec.: +7.12±0.34 [2] mas/yr
Parallax (π)1.53±0.34  mas [2]
Distance approx. 2,100  ly
(approx. 700  pc)
Absolute magnitude  (MV)−1.06[ citation needed ]
Orbit [5]
PrimaryHD 72018 Aa
CompanionHD 72018 Ab
Period (P)340±50 yr
Semi-major axis (a)0.427±0.030″
Eccentricity (e)0.748±0.030
Inclination (i)78.9±2.0°
Longitude of the node (Ω)114.7±2.0°
Periastron epoch (T)1947.7±2.0
Argument of periastron (ω)
(secondary)		300.0±5.0°
Details
HD 72018 Aa
Mass 6.08±3.43 [5]   M☉
HD 72018 Ab
Mass 5.45±3.08 [5]   M☉
Other designations
HR 3358, CD−47°4004, HIP 41616, SAO 219985, WDS J08291-4756AB [6]
Database references
SIMBAD data

HD 72108 (A Vel, A Velorum) is a star system in the constellation Vela. It is approximately 1640 light years from Earth.

The primary component, HD 72108 A, is a blue-white B-type subgiant with an apparent magnitude of +5.33. It is a spectroscopic binary, whose components are separated by 0.176 arcseconds. At a distance of 4 arcseconds away is the third component, the magnitude +7.7 HD 72108 B. The fourth component, HD 72108 C has an apparent magnitude of +9.3, and is 19 arcseconds from the primary.

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific . 99 (617): 695. Bibcode:1987PASP...99..695R. doi: 10.1086/132034 . Constellation record for this object at VizieR.
  2. 1 2 3 4 5 van Leeuwen, F. (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. Vizier catalog entry
  3. ↑ Docobo, J. A.; Andrade, M. (2013). "Dynamical and physical properties of 22 binaries discovered by W. S. Finsen". Monthly Notices of the Royal Astronomical Society. 428 (1): 321–339. Bibcode:2013MNRAS.428..321D. doi: 10.1093/mnras/sts045 .
  4. ↑ Kharchenko, N. V.; et al. (2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ˜55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten. 328 (9): 889. arXiv: 0705.0878 . Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776. S2CID   119323941.
  5. 1 2 3 Docobo, J. A.; Andrade, M. (2013). "Dynamical and physical properties of 22 binaries discovered by W. S. Finsen". Monthly Notices of the Royal Astronomical Society. 428 (1): 321–339. Bibcode:2013MNRAS.428..321D. doi: 10.1093/mnras/sts045 .
  6. ↑ "HR 3358 -- Double or multiple star". SIMBAD Astronomical Database. Centre de données astronomiques de Strasbourg . Retrieved 2014-12-02.


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