Kappa Chamaeleontis
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Chamaeleon |
| Right ascension | 12h 04m 46.471s |
| Declination | −76° 31′ 08.62″ |
| Apparent magnitude (V) | 5.024 |
| Characteristics | |
| Spectral type | K4III |
| U−B color index | +1.78 |
| B−V color index | +1.49 |
| Astrometry | |
| Radial velocity (Rv) | −2.19±0.19 km/s |
| Proper motion (μ) | RA: −77.818 mas/yr Dec.: 45.738 mas/yr |
| Parallax (π) | 6.4916±0.0843 mas |
| Distance | 502 ± 7 ly (154 ± 2 pc) |
| Absolute magnitude (MV) | −0.78 |
| Details | |
| Mass | 1.4 M☉ |
| Radius | 45.2+1.7 −1.2 R☉ |
| Luminosity | 472.0+29.5 −15.8 L☉ |
| Surface gravity (log g) | 0.90+0.07 −0.02 cgs |
| Temperature | 3,914+47 −8 K |
| Rotational velocity (v sin i) | <1.0 km/s |
| Other designations | |
| κ Cha, CPD−75°777, HD 104902, HIP 58905, HR 4605, SAO 256899 | |
| Database references | |
| SIMBAD | data |
Kappa Chamaeleonitis is a single star in the southern constellation of Chamaeleon. Its name is a Bayer designation that is Latinized from κ Chamaeleonitis, and abbreviated Kappa Cha or κ Cha. This object is visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 5.024. The distance to this object is approximately 490 light-years, based on the star's parallax. It is drifting closer with a radial velocity of −2 km/s.
This is an aging K-type giant star with a stellar classification of K4III, having exhausted the supply of hydrogen at its core then cooled and expanded to its current size of 45 times the Sun's radius. It is a candidate periodic microvariable, with its brightness fluctuating by 0.005 magnitude at the rate of 0.25664 cycles per day. The star is 1.4 times as massive as the Sun and is radiating 472 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 3,914 K.
References
- 1 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. XHIP record for this object at VizieR.
- 1 2 3 4 5 6 7 8 9 10 11 12 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- 1 2 Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.
- 1 2 3 4 5 de Medeiros, J. R.; et al. (2014). "A catalog of rotational and radial velocities for evolved stars". Astronomy & Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. S2CID 54046583.
- 1 2 Johnson, H. L. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99. Bibcode:1966CoLPL...4...99J.
- 1 2 Chandler, Colin Orion; et al. (2016). "The Catalog of Earth-Like Exoplanet Survey Targets (CELESTA): A Database of Habitable Zones Around Nearby Stars". The Astronomical Journal. 151 (3): 59. arXiv:1510.05666. Bibcode:2016AJ....151...59C. doi:10.3847/0004-6256/151/3/59. S2CID 119246448.
- ↑ "kap Cha". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-11.
- ↑ Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.
- ↑ Koen, Chris; Eyer, Laurent (2002). "New periodic variables from the Hipparcos epoch photometry". Monthly Notices of the Royal Astronomical Society. 331 (1): 45–59. arXiv:astro-ph/0112194. Bibcode:2002MNRAS.331...45K. doi:10.1046/j.1365-8711.2002.05150.x. S2CID 10505995.
