36 G. Doradus
| Observation data EpochJ2000EquinoxJ2000 | |
|---|---|
| Constellation | Dorado |
| Right ascension | 05h54m06.05459s[1] |
| Declination | −63° 05′ 23.2090″[1] |
| Apparent magnitude(V) | 4.65[2] |
| Characteristics | |
| Spectral type | K2 III[3] |
| B−Vcolor index | 1.022±0.045[2] |
| Astrometry | |
| Radial velocity(Rv) | +25.1±0.8[2]km/s |
| Proper motion(μ) | RA:+148.129mas/yr[1] Dec.:+550.143mas/yr[1] |
| Parallax(π) | 36.5981 ± 0.0924mas[1] |
| Distance | 89.1 ± 0.2ly (27.32 ± 0.07pc) |
| Absolute magnitude(MV) | 2.56[2] |
| Details[4] | |
| Mass | 1.07±0.08M☉ |
| Radius | 4.76±0.14R☉ |
| Luminosity | 10.9±0.3L☉ |
| Surface gravity(logg) | 3.020±0.155cgs |
| Temperature | 4,807±62K |
| Metallicity[Fe/H] | +0.141±0.035dex |
| Age | 7.91[5]Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
36 G. Doradus(HD 40409) is a suspectedastrometric binary[7]starsystem in the southernconstellationofDorado.It is a faint system but visible to the naked eye with anapparent visual magnitudeof 4.65.[2]Based upon an annualparallax shiftof36.60mas,[1]it is located 89light yearsaway from theSun.It is moving further away with a heliocentricradial velocityof +25 km/s.[2]The system has a relatively high proper motion, traversing thecelestial sphereat the rate of0.57arcsecondsper year along aposition angleof 14.51°.[8]
Based on thestellar classificationof K2 III assigned by Gray et al. (2006),[3]the visible component is aK-typegiant star.In contrast, Keenan and McNeil (1989) gave it a somewhat less evolved classification of K2 III–IV.[9]It is about eight billion years old[5]with 7% moremass than the Sun,and has expanded to 4.76 times theSun's radius.The star is radiating 11 times theSun's luminosityfrom its enlargedphotosphereat aneffective temperatureof 4,807 K.[4]
References
[edit]- ^abcdeVallenari, A.; et al. (Gaia collaboration) (2023)."GaiaData 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.S2CID244398875. Gaia DR3 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.
- ^abGray, R. O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc-The Southern Sample",The Astronomical Journal,132(1): 161–170,arXiv:astro-ph/0603770,Bibcode:2006AJ....132..161G,doi:10.1086/504637,S2CID119476992.
- ^abOttoni, G.; Udry, S.; Ségransan, D.; Buldgen, G.; Lovis, C.; Eggenberger, P.; Pezzotti, C.; Adibekyan, V.; Marmier, M.; Mayor, M.; Santos, N. C.; Sousa, S. G.; Lagarde, N.; Charbonnel, C. (2022-01-01). "CORALIE radial-velocity search for companions around evolved stars (CASCADES). I. Sample definition and first results: Three new planets orbiting giant stars".Astronomy and Astrophysics.657:A87.arXiv:2201.01528.Bibcode:2022A&A...657A..87O.doi:10.1051/0004-6361/202040078.ISSN0004-6361.36 G. Doradus' database entryatVizieR.
- ^abWittenmyer, Robert A.; Liu, Fan; Wang, Liang; Casagrande, Luca; Johnson, John Asher; Tinney, C. G. (July 2016), "The Pan-Pacific Planet Search. V. Fundamental Parameters for 164 Evolved Stars",The Astronomical Journal,152(1): 15,arXiv:1605.00323,Bibcode:2016AJ....152...19W,doi:10.3847/0004-6256/152/1/19,S2CID55991800,19.
- ^"HD 40409".SIMBAD.Centre de données astronomiques de Strasbourg.Retrieved2018-07-16.
- ^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.
- ^Bakos, Gáspár Á.; et al. (July 2002), "Revised Coordinates and Proper Motions of the Stars in the Luyten Half-Second Catalog",The Astrophysical Journal Supplement Series,141(1): 187–193,arXiv:astro-ph/0202164,Bibcode:2002ApJS..141..187B,doi:10.1086/340115,S2CID36667868.
- ^Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars",Astrophysical Journal Supplement Series,71:245,Bibcode:1989ApJS...71..245K,doi:10.1086/191373.
