Community hub
0 subscribers8 pages, 0 posts
Recent from talks
All channels
Be the first to start a discussion here.
Be the first to start a discussion here.
Be the first to start a discussion here.
Be the first to start a discussion here.
Contribute something
Welcome to the community hub built to collect knowledge and have discussions related to Kappa Capricorni.
Nothing was collected or created yet.
Kappa Capricorni
View on Wikipediafrom Wikipedia
  | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Capricornus |
| Right ascension | 21h 42m 39.508s[1] |
| Declination | −18° 51′ 58.76″[1] |
| Apparent magnitude (V) | +4.73[2] |
| Characteristics | |
| Evolutionary stage | red clump[3] |
| Spectral type | G8 III[4] |
| U−B color index | +0.51[2] |
| B−V color index | +0.88[2] |
| Astrometry | |
| Radial velocity (Rv) | −2.87±0.18[5] km/s |
| Proper motion (μ) | RA: +146.354 mas/yr[1] Dec.: −8.343 mas/yr[1] |
| Parallax (π) | 10.6991±0.1277 mas[1] |
| Distance | 305 ± 4 ly (93 ± 1 pc) |
| Absolute magnitude (MV) | −0.023[6] |
| Details[7] | |
| Mass | 2.43±0.21 M☉ |
| Radius | 13.28±0.47 R☉ |
| Luminosity | 106.8±5.9 L☉ |
| Surface gravity (log g) | 2.59±0.06 cgs |
| Temperature | 5,096±57 K |
| Metallicity [Fe/H] | −0.39±0.10 dex |
| Rotational velocity (v sin i) | 0.0[5] km/s |
| Age | 1.19[8] Gyr |
| Other designations | |
| κ Cap, 43 Cap, BD−19°6152, HD 206453, HIP 107188, HR 8288, SAO 164593[9] | |
| Database references | |
| SIMBAD | data |
Kappa Capricorni is a solitary[10] star in the constellation Capricornus. Its name is a Bayer designation that is Latinized from κ Capricorni, and abbreviated Kappa Cap or κ Capricorni. This star is visible to the naked eye with an apparent visual magnitude of +4.73.[2] Based upon an annual parallax shift of 11.09 mas as seen from the Earth,[1] the star is located about 305 light-years (93 pc) from the Sun. It is drifting closer with a line of sight velocity of −3 km/s.[5] The star is positioned sufficiently close to the ecliptic that it is occasionally subject to lunar occultation.[11]
This is a yellow-hued, evolved, G-type giant star with a stellar classification of G8 III.[4] There is a 91% probability that it is currently on the horizontal branch, rather than the red giant branch.[7] As such, it is a red clump[3] giant with an estimated 2.43 times the mass of the Sun and has expanded to 13.28 times the radius of the Sun.[7] The star is about 1.2[8] billion years old and has a projected rotational velocity that is too small to be measured.[5] It radiates 107 times the solar luminosity from its photosphere at an effective temperature of 5,096 K.[7]
References
[edit]- ^ a b c d e 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.
- ^ a b c d 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.
- ^ a b Alves, David R. (August 2000), "K-Band Calibration of the Red Clump Luminosity", The Astrophysical Journal, 539 (2): 732–741, arXiv:astro-ph/0003329, Bibcode:2000ApJ...539..732A, doi:10.1086/309278, S2CID 16673121.
- ^ a b Houk, N.; Smith-Moore, M. (1988), Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars, vol. 4, Bibcode:1988mcts.book.....H.
- ^ a b c d Massarotti, Alessandro; et al. (January 2008), "Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity", The Astronomical Journal, 135 (1): 209–231, Bibcode:2008AJ....135..209M, doi:10.1088/0004-6256/135/1/209, S2CID 121883397.
- ^ Soubiran, C.; et al. (2008), "Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants", Astronomy and Astrophysics, 480 (1): 91–101, arXiv:0712.1370, Bibcode:2008A&A...480...91S, doi:10.1051/0004-6361:20078788, S2CID 16602121.
- ^ a b c d Reffert, Sabine; et al. (2015), "Precise radial velocities of giant stars. VII. Occurrence rate of giant extrasolar planets as a function of mass and metallicity", Astronomy and Astrophysics, 574A (2): 116–129, arXiv:1412.4634, Bibcode:2015A&A...574A.116R, doi:10.1051/0004-6361/201322360, hdl:10722/215277, S2CID 59334290. Values are based on 91% probability it is on the horizontal branch.
- ^ a b Luck, R. Earle (2015), "Abundances in the Local Region. I. G and K Giants", The Astronomical Journal, 150 (3): 88, arXiv:1507.01466, Bibcode:2015AJ....150...88L, doi:10.1088/0004-6256/150/3/88, S2CID 118505114.
- ^ "kap Cap". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-05-13.
{{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.
- ^ Evans, D. S.; et al. (November 1985), "Photoelectric observations of lunar occultations. XV.", Astronomical Journal, 90: 2360–2371, Bibcode:1985AJ.....90.2360E, doi:10.1086/113941.
