HD 111597

HD 111597 is a suspected astrometric binary[7] star system in the southern constellation of Centaurus. It has the Bayer designation p Centauri, while HD 111597 is the star's identifier from the Henry Draper catalogue. The system is visible to the naked eye as a faint point of light with an apparent visual magnitude of 4.90.[2] It is located at a distance of approximately 380 light years from the Sun based on parallax,[1] and has an absolute magnitude of −0.53.[2] The system is a probable member of the Sco OB2 association of co-moving stars.[8] The visible component is a B-type main-sequence star with a stellar classification of B9V.[3]

This article is about p Centauri. It is not to be confused with π Centauri or ρ Centauri.
HD 111597
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Centaurus
Right ascension  12h 50m 41.16426s[1]
Declination −33° 59′ 57.6145″[1]
Apparent magnitude (V) 4.90[2]
Characteristics
Spectral type B9V[3]
B−V color index −0.031±0.002[2]
Astrometry
Radial velocity (Rv)+4.00±4.20[2] km/s
Proper motion (μ) RA: −30.421[1] mas/yr
Dec.: −16.157[1] mas/yr
Parallax (π)8.5873 ± 0.2402[1] mas
Distance380 ± 10 ly
(116 ± 3 pc)
Absolute magnitude (MV)−0.53[2]
Details
Radius3.0[4] R☉
Luminosity182.13[2] L☉
Age321[5] Myr
Other designations
p Cen, CD−33°8653, FK5 1331, HD 111597, HIP 62683, HR 4874, SAO 203863, CCDM J12507-3400, WDS J12507-3400A[6]
Database references
SIMBADdata

References
  1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. 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.
  3. Houk, Nancy (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, 3, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1982mcts.book.....H.
  4. Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics (Third ed.), 367 (2): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451.
  5. Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters, 38 (11): 694–706, arXiv:1606.09028, Bibcode:2012AstL...38..694G, doi:10.1134/S1063773712110035.
  6. "HD 111597". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-01-30.
  7. 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
  8. Rizzuto, Aaron; et al. (October 2011), "Multidimensional Bayesian membership analysis of the Sco OB2 moving group", Monthly Notices of the Royal Astronomical Society, 416 (4): 3108–3117, arXiv:1106.2857, Bibcode:2011MNRAS.416.3108R, doi:10.1111/j.1365-2966.2011.19256.x.
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