106 Herculis
| Observation data EpochJ2000EquinoxJ2000 | |
|---|---|
| Constellation | Hercules |
| Right ascension | 18h20m17.91482s[1] |
| Declination | +21° 57′ 40.6622″[1] |
| Apparent magnitude(V) | 4.96[2] |
| Characteristics | |
| Spectral type | M0 III[3] |
| U−Bcolor index | +1.98[4] |
| B−Vcolor index | +1.58[4] |
| Variable type | suspectedSR[5][6] |
| Astrometry | |
| Radial velocity(Rv) | −35.20±0.29[7]km/s |
| Proper motion(μ) | RA:+18.105[1]mas/yr Dec.:-59.631[1]mas/yr |
| Parallax(π) | 8.5067 ± 0.1739mas[1] |
| Distance | 383 ± 8ly (118 ± 2pc) |
| Absolute magnitude(MV) | −0.664[7] |
| Details | |
| Radius | 44.32+2.70 −5.89[1]R☉ |
| Luminosity | 414.1±9.7[1]L☉ |
| Surface gravity(logg) | 1.56±0.09[3]cgs |
| Temperature | 3,789±6[3]K |
| Metallicity[Fe/H] | 0.00±0.03[3]dex |
| Rotational velocity(vsini) | 5.0±1.0[8]km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
106 Herculisis avariable starin the northernconstellationHercules.It is visible to the naked eye as a faint, red-hued point of light with a baselineapparent visual magnitudeof 4.96.[2]Based on itsparallax,it is estimated to lie 383 light-years (117 parsecs) away from the Sun.[3]The star is moving closer to the Earth with a heliocentricradial velocityof -35 km/s.[7]
Eggleton and Tokovinin (2008) listed this as a suspectedbinary starsystem consisting of two roughly equal components.[10]It appears as an ageingred giantwith astellar classificationof M0III. This is a suspectedsemiregular variable starwith a very small amplitude and a period of 40 days or more.[6]Having exhausted the supply of hydrogen at itscore,it has expanded to 44[1]times theSun's radius.It is radiating around 414[1]times theluminosity of the Sunfrom its enlargedphotosphereat aneffective temperatureof about 3,789 K.[3]
References
[edit]- ^abcdefghiBrown, 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.
- ^abJ. R., Ducati (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system".CDS/ADC Collection of Electronic Catalogues.2237.Bibcode:2002yCat.2237....0D.
- ^abcdefWu, Yue; et al. (2010). "Coudé-feed stellar spectral library – atmospheric parameters".Astronomy & Astrophysics.525:A71.arXiv:1009.1491.Bibcode:2011A&A...525A..71W.doi:10.1051/0004-6361/201015014.S2CID53480665.
- ^abMermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)".Catalogue of Eggen's UBV Data.Bibcode:1986EgUBV........0M.
- ^Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)".VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S.1:B/gcvs.Bibcode:2009yCat....102025S.
- ^abPercy, John R. (1993)."The photometric variability of K giants".Publications of the Astronomical Society of the Pacific.105:1422.Bibcode:1993PASP..105.1422P.doi:10.1086/133324.
- ^abcSoubiran, C.; Bienaymé, O.; Mishenina, T. V.; Kovtyukh, V. V. (2008). "Vertical distribution of Galactic disk stars".Astronomy & Astrophysics.480(1): 91–101.arXiv:0712.1370.Bibcode:2008A&A...480...91S.doi:10.1051/0004-6361:20078788.S2CID16602121.
- ^Zamanov, R. K.; et al. (October 2008)."Rotational velocities of the giants in symbiotic stars - III. Evidence of fast rotation in S-type symbiotics".Monthly Notices of the Royal Astronomical Society.390(1): 377–382.arXiv:0807.3817.Bibcode:2008MNRAS.390..377Z.doi:10.1111/j.1365-2966.2008.13751.x.S2CID118697261.
- ^"106 Her".SIMBAD.Centre de données astronomiques de Strasbourg.Retrieved2019-06-17.
- ^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.S2CID14878976.
