13 Trianguli
  | |
| Observation data EpochJ2000EquinoxJ2000 | |
|---|---|
| Constellation | Triangulum |
| Right ascension | 02h28m48.49449s[1] |
| Declination | +29° 55′ 54.3286″[1] |
| Apparent magnitude(V) | 5.89[2] |
| Characteristics | |
| Spectral type | G0 V[2] |
| U−Bcolor index | +0.01[3] |
| B−Vcolor index | +0.591±0.014[2] |
| Astrometry | |
| Radial velocity(Rv) | +40.8[4]km/s |
| Proper motion(μ) | RA:–66.071[1]mas/yr Dec.:+71.499[1]mas/yr |
| Parallax(π) | 31.7031 ± 0.1014mas[1] |
| Distance | 102.9 ± 0.3ly (31.5 ± 0.1pc) |
| Absolute magnitude(MV) | 3.45[5] |
| Details | |
| Mass | 1.10±0.03[5]M☉ |
| Radius | 1.86±0.03[1]R☉ |
| Luminosity | 3.72[5]L☉ |
| Temperature | 5,846[5]K |
| Metallicity[Fe/H] | −0.24[6]dex |
| Rotational velocity(vsini) | 3[7]km/s |
| Age | 6.45[5]Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
13 Trianguliis theFlamsteed designationfor astarin the northernconstellationofTriangulum.It has anapparent visual magnitudeof 5.89,[2]so according to theBortle scaleit is faintly visible from dark suburban skies. The star is located at a distance of 103light yearsfrom theSunbased onparallaxmeasurements,[1]and is drifting further away with aradial velocityof +41 km/s.[4]It made a close approach to the Sun some 665,000 years ago at an estimated separation of 34.3 light-years.[2]
Astellar classificationof G0 V[2]indicates this is amain sequence starthat is generating energy byfusinghydrogen into helium at its core. It has about 110% of theSun's mass,186% of theSun's radius,and shines with 3.72 times the luminosity of the Sun. Thestellar atmospherehas aneffective temperatureof 5,846 K,[5]giving it the yellow hue of aG-type star.[8]It appears to be older than the Sun, with an estimated age of 6.45 billion years.[5]
In 1994, anastrometric companionwas reported at anangular separationof 0.020″. However, follow-up observations reported in 2005 not only failed to recover this object but also returned a null result on a search for planetary companions.[9]The star has been examined for an infrared excess that could indicate the presence of an orbitingdebris disk,but no such excess was found.[6]
References
[edit]- ^abcdefgBrown, A. G. A.;et al. (Gaia collaboration) (August 2018)."GaiaData 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 sourceatVizieR.
- ^abcdefAnderson, 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,S2CID119257644.
- ^ab"13 Tri -- Star",SIMBAD Astronomical Database,Centre de Données astronomiques de Strasbourg,retrieved2013-10-13.
- ^abNordström, B.; et al. (May 2004), "The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ˜14,000 F and G dwarfs",Astronomy and Astrophysics,418(3): 989–1019,arXiv:astro-ph/0405198,Bibcode:2004A&A...418..989N,doi:10.1051/0004-6361:20035959,S2CID11027621.
- ^abcdefgTakeda, Yoichi (April 2007), "Fundamental Parameters and Elemental Abundances of 160 F-G-K Stars Based on OAO Spectrum Database",Publications of the Astronomical Society of Japan,59(2): 335–356,Bibcode:2007PASJ...59..335T,doi:10.1093/pasj/59.2.335.
- ^abMaldonado, J.; et al. (May 2012). "Metallicity of solar-type stars with debris discs and planets".Astronomy & Astrophysics.541:A40.arXiv:1202.5884.Bibcode:2012A&A...541A..40M.doi:10.1051/0004-6361/201218800.S2CID46328823.
- ^Takeda, Yoichi; et al. (February 2005), "High-Dispersion Spectra Collection of Nearby F--K Stars at Okayama Astrophysical Observatory: A Basis for Spectroscopic Abundance Standards",Publications of the Astronomical Society of Japan,57(1): 13–25,Bibcode:2005PASJ...57...13T,doi:10.1093/pasj/57.1.13.
- ^"The Colour of Stars",Australia Telescope, Outreach and Education,Commonwealth Scientific and Industrial Research Organisation,December 21, 2004, archived fromthe originalon March 18, 2012,retrieved2012-01-16.
- ^van Belle, G. T.; et al. (May 2008). "The Palomar Testbed Interferometer Calibrator Catalog".The Astrophysical Journal Supplement Series.176(1): 276–292.arXiv:0711.4194.Bibcode:2008ApJS..176..276V.doi:10.1086/526548.S2CID10713221.
