From Wikipedia, the free encyclopedia
HD 125628
Observation data
Epoch J2000       Equinox J2000
Constellation Centaurus
Right ascension 14h 22m 37.07301s [1]
Declination −58° 27′ 32.8193″ [1]
Apparent magnitude (V) 4.76 [2] (5.09 + 6.94) [3]
Characteristics
Spectral type G9III + F5V [3]
B−V color index 0.795±0.003 [2]/0.45 [4]
Astrometry
Radial velocity (Rv)+14.6±2.8 [2] km/s
Proper motion (μ) RA: −43.66±0.90 [1]  mas/ yr
Dec.: +17.22±0.76 [1]  mas/ yr
Parallax (π)8.51 ± 1.11  mas [1]
Distanceapprox. 380  ly
(approx. 120  pc)
Absolute magnitude (MV)−0.55 [2]
Details
A
Rotational velocity (v sin i)5.5 [4] km/s
Age3.6 [4]  Gyr
B
Rotational velocity (v sin i)6.3 [4] km/s
Other designations
CPD−57°6619, HD 125628, HIP 70264, HR 5371, SAO 241673 [5]
Database references
SIMBAD data

HD 125628 is a binary star [3] system in the constellation Centaurus. It is faintly visible to the naked eye with a combined apparent visual magnitude of 4.76. [2] The distance to this system is approximately 380  light years based on parallax. It is drifting further away from the Sun with a radial velocity of +15 km/s. [2] The absolute magnitude is −0.55. [2]

The primary component of this system, component A, is an aging giant star with a stellar classification of G9III [3] and a visual magnitude of 5.09. [3] The secondary companion, designated component B, is a magnitude 6.94 [3] star located at an angular separation of 9.10 from the primary, along a position angle of 157°, as of 2016. [6] It is an F-type main-sequence star with a class of F5V. [3]

References

  1. ^ a b c d e 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.
  2. ^ a b c d e f g Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv: 1108.4971. Bibcode: 2012AstL...38..331A. doi: 10.1134/S1063773712050015. S2CID  119257644.
  3. ^ a b c d e f g Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv: 0806.2878. Bibcode: 2008MNRAS.389..869E. doi: 10.1111/j.1365-2966.2008.13596.x. S2CID  14878976.
  4. ^ a b c d Desidera, S.; et al. (August 2006). "Spectroscopic characterization of a sample of southern visual binaries". Astronomy and Astrophysics. 454 (2): 553–558. Bibcode: 2006A&A...454..553D. doi: 10.1051/0004-6361:20064895.
  5. ^ "HD 125628". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-07-27.
  6. ^ Mason, B. D.; et al. (2014). "The Washington Visual Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode: 2001AJ....122.3466M. doi: 10.1086/323920.
From Wikipedia, the free encyclopedia
HD 125628
Observation data
Epoch J2000       Equinox J2000
Constellation Centaurus
Right ascension 14h 22m 37.07301s [1]
Declination −58° 27′ 32.8193″ [1]
Apparent magnitude (V) 4.76 [2] (5.09 + 6.94) [3]
Characteristics
Spectral type G9III + F5V [3]
B−V color index 0.795±0.003 [2]/0.45 [4]
Astrometry
Radial velocity (Rv)+14.6±2.8 [2] km/s
Proper motion (μ) RA: −43.66±0.90 [1]  mas/ yr
Dec.: +17.22±0.76 [1]  mas/ yr
Parallax (π)8.51 ± 1.11  mas [1]
Distanceapprox. 380  ly
(approx. 120  pc)
Absolute magnitude (MV)−0.55 [2]
Details
A
Rotational velocity (v sin i)5.5 [4] km/s
Age3.6 [4]  Gyr
B
Rotational velocity (v sin i)6.3 [4] km/s
Other designations
CPD−57°6619, HD 125628, HIP 70264, HR 5371, SAO 241673 [5]
Database references
SIMBAD data

HD 125628 is a binary star [3] system in the constellation Centaurus. It is faintly visible to the naked eye with a combined apparent visual magnitude of 4.76. [2] The distance to this system is approximately 380  light years based on parallax. It is drifting further away from the Sun with a radial velocity of +15 km/s. [2] The absolute magnitude is −0.55. [2]

The primary component of this system, component A, is an aging giant star with a stellar classification of G9III [3] and a visual magnitude of 5.09. [3] The secondary companion, designated component B, is a magnitude 6.94 [3] star located at an angular separation of 9.10 from the primary, along a position angle of 157°, as of 2016. [6] It is an F-type main-sequence star with a class of F5V. [3]

References

  1. ^ a b c d e 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.
  2. ^ a b c d e f g Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv: 1108.4971. Bibcode: 2012AstL...38..331A. doi: 10.1134/S1063773712050015. S2CID  119257644.
  3. ^ a b c d e f g Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv: 0806.2878. Bibcode: 2008MNRAS.389..869E. doi: 10.1111/j.1365-2966.2008.13596.x. S2CID  14878976.
  4. ^ a b c d Desidera, S.; et al. (August 2006). "Spectroscopic characterization of a sample of southern visual binaries". Astronomy and Astrophysics. 454 (2): 553–558. Bibcode: 2006A&A...454..553D. doi: 10.1051/0004-6361:20064895.
  5. ^ "HD 125628". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-07-27.
  6. ^ Mason, B. D.; et al. (2014). "The Washington Visual Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode: 2001AJ....122.3466M. doi: 10.1086/323920.

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