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Kappa Normae 
Summary
Kappa Normae, Latinized from κ Normae, is a solitary,[7] yellow hued star in the southern constellation of Norma. Its apparent magnitude is 4.94,[2] which is bright enough to be faintly visible to the naked eye. Based upon an annual parallax shift of 7.44 mas as seen from Earth,[8] the system is located about 440 light years from the Sun. It is drifting closer with a radial velocity of 13.5 km/s.[4]
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Norma |
| Right ascension | 16h 13m 28.72874s[1] |
| Declination | −54° 37′ 49.6860″[1] |
| Apparent magnitude (V) | 4.94[2] |
| Characteristics | |
| Spectral type | G8 III[3] |
| U−B color index | +0.81[2] |
| B−V color index | +1.04[2] |
| Astrometry | |
| Radial velocity (Rv) | −13.5±0.8[4] km/s |
| Proper motion (μ) | RA: −3.845[1] mas/yr Dec.: −22.366[1] mas/yr |
| Parallax (π) | 7.4386 ± 0.2471 mas[1] |
| Distance | 440 ± 10 ly (134 ± 4 pc) |
| Absolute magnitude (MV) | −0.64[5] |
| Details | |
| Radius | 21.8+0.6 −1.5[1] R☉ |
| Luminosity | 225.7±8.5[1] L☉ |
| Temperature | 4,787+173 −69[1] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is an evolved giant star with a stellar classification of G8III[3] that has swollen and cooled off the main sequence. At present it has 22[1] times the radius of the Sun. It shines with a luminosity approximately 226 times that of the Sun and has an effective temperature of 4,787 K.[1]
References edit
- ^ a b c d e f g h i j 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.
- ^ a b c d Lodén, L. O.; Nordström, B. (1969), "Photometric standard sequences in Norma iII = 320° − 340°", Arkiv för Astronomi, 5: 231–239, Bibcode:1969ArA.....5..231L.
- ^ a b Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1975mcts.book.....H.
- ^ a b 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.
- ^ 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.
- ^ "kap Nor". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-08-11.
{{cite web}}: CS1 maint: postscript (link) - ^ 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.
- ^ 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.