Kappa Pictoris

κ Pictoris, Latinised as Kappa Pictoris, is a star in the constellation Pictor. It is close to the lower limit of stars that are visible to the naked eye having an apparent visual magnitude of +6.11.[2] Based upon an annual parallax shift of 5.14 mas as seen from Earth,[1] this star is located around 630 light years from the Sun. At that distance, the visual magnitude is diminished by an extinction factor of 0.10 due to interstellar dust.[5]

Kappa Pictoris
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Pictor
Right ascension 05h 22m 22.14661s[1]
Declination −56° 08′ 03.8409″[1]
Apparent magnitude (V) +6.11[2]
Characteristics
Spectral type B8/9 V[3]
B−V color index −0.10[2]
Astrometry
Radial velocity (Rv)−5.0±7.4[4] km/s
Proper motion (μ) RA: −5.03[1] mas/yr
Dec.: +22.01[1] mas/yr
Parallax (π)5.14 ± 0.25 mas[1]
Distance630 ± 30 ly
(195 ± 9 pc)
Absolute magnitude (MV)+0.34[5]
Details[6]
Mass3.42±0.07 M☉
Luminosity210 L☉
Temperature11,641 K
Rotational velocity (v sin i)264 km/s
Age256[5] Myr
Other designations
κ Pic, CPD−56° 840, FK5 2403, HD 35580, HIP 25098, HR 1801, SAO 233952[7]
Database references
SIMBADdata

This is a B-type main sequence star with a stellar classification of B8/9 V.[3] It is about 76.4% of the way through its main sequence lifespan.[6] The star is spinning rapidly with a projected rotational velocity of 264 km/s.[6] It has an estimated 3.4 times the mass of the Sun and is radiating 210 times the Sun's luminosity from its photosphere at an effective temperature of 11,641 K.[6]

References
  1. 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. Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J.
  3. Houk, Nancy (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
  4. de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
  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, S2CID 119108982.
  6. Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789.
  7. "kap Pic". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-06-21.{{cite web}}: CS1 maint: postscript (link)
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.