Astronomy:Kappa Pictoris
| Observation data 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[1] mas |
| Distance | 630 ± 30 ly (195 ± 9 pc) |
| Absolute magnitude (MV) | +0.34[5] |
| Details[6] | |
| Mass | 3.42±0.07 M☉ |
| Luminosity | 210 L☉ |
| Temperature | 11,641 K |
| Rotational velocity (v sin i) | 264 km/s |
| Age | 256[5] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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]
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
- ↑ 1.0 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.
- ↑ 2.0 2.1 2.2 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.
- ↑ 3.0 3.1 Houk, Nancy (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode: 1978mcts.book.....H.
- ↑ 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, doi:10.1051/0004-6361/201219219, A61, Bibcode: 2012A&A...546A..61D.
- ↑ 5.0 5.1 5.2 Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters 38 (11): 694–706, doi:10.1134/S1063773712110035, Bibcode: 2012AstL...38..694G.
- ↑ 6.0 6.1 6.2 6.3 Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics 537: A120, doi:10.1051/0004-6361/201117691, Bibcode: 2012A&A...537A.120Z.
- ↑ "kap Pic". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=kap+Pic.
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