58 Aquarii
| Observation data EpochJ2000EquinoxJ2000 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 22h31m41.31672s[1] |
| Declination | −10° 54′ 19.8148″[1] |
| Apparent magnitude(V) | 6.39[2] |
| Characteristics | |
| Spectral type | A9/F0 V[3]or A8 III[4] |
| B−Vcolor index | 0.290±0.009[2] |
| Astrometry | |
| Radial velocity(Rv) | +4.0±4.3[5]km/s |
| Proper motion(μ) | RA:+77.347[1]mas/yr Dec.:−52.472[1]mas/yr |
| Parallax(π) | 13.4137 ± 0.1535mas[1] |
| Distance | 243 ± 3ly (74.6 ± 0.9pc) |
| Absolute magnitude(MV) | 2.12[2] |
| Details[6] | |
| Mass | 1.734±0.107M☉ |
| Radius | 2.059+0.305 −0.164R☉ |
| Luminosity | 11.73[2]L☉ |
| Surface gravity(logg) | 4.040+0.065 −0.104cgs |
| Temperature | 7,477+377 −528K |
| Metallicity[Fe/H] | 0.014+0.150 −0.120dex |
| Rotational velocity(vsini) | 30.0±10.0[7]km/s |
| Age | 1.086[8]Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
58 Aquarii,abbreviated58 Aqr,is astarin theconstellationofAquarius.58 Aquariiis itsFlamsteed designation.It is a sixth magnitude star with anapparent visual magnitudeof 6.39,[2]which means it is a challenge to view with the naked eye. Based upon an annualparallax shiftof13.4mas,[1]it is located 243light yearsfrom the Sun. This has been identified as avisual binarysystem with anorbital periodof 829.976 days (2.27 years)[10]in a circular orbit (eccentricityof zero).[11]
The primary component has astellar classificationof A9/F0 V,[3]matching amain sequencestar with aspectrumshowing mixed traits of anA/F-type.(Cowley and Fraquelli [1974] has previously assigned it agiant starclass of A8 III.)[4]It is achemically peculiarAm star,showingmetallic lineswith nomagnetic field.[7]The star has 1.7 times themass of the Sunand 2.1 times theSun's radius.It is radiating 12 times theSun's luminosityfrom itsphotosphereat aneffective temperatureof 7,477 K.[6]
References
[edit]- ^abcdefBrown, 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.
- ^abcdeAnderson, 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.
- ^abHouk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars",Michigan Spectral Survey,5,Bibcode:1999MSS...C05....0H.
- ^abCowley, A.; Fraquelli, D. (1974), "MK Spectral Types for Some Bright F Stars",Publications of the Astronomical Society of the Pacific,86(509): 70,Bibcode:1974PASP...86...70C,doi:10.1086/129562.
- ^Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system",Astronomy Letters,32(11): 759–771,arXiv:1606.08053,Bibcode:2006AstL...32..759G,doi:10.1134/S1063773706110065,S2CID119231169.
- ^abHuber, Daniel; et al. (2016), "The K2 Ecliptic Plane Input Catalog (EPIC) and Stellar Classifications of 138,600 Targets in Campaigns 1-8",The Astrophysical Journal Supplement Series,224(1): 2,arXiv:1512.02643,Bibcode:2016ApJS..224....2H,doi:10.3847/0067-0049/224/1/2,S2CID118621218.
- ^abPaunzen, E.; et al. (February 2013), "A photometric study of chemically peculiar stars with the STEREO satellites - II. Non-magnetic chemically peculiar stars",Monthly Notices of the Royal Astronomical Society,429(1): 119–125,arXiv:1211.1535,Bibcode:2013MNRAS.429..119P,doi:10.1093/mnras/sts318,S2CID119231581.
- ^David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets",The Astrophysical Journal,804(2): 146,arXiv:1501.03154,Bibcode:2015ApJ...804..146D,doi:10.1088/0004-637X/804/2/146,S2CID33401607.
- ^"58 Aqr".SIMBAD.Centre de données astronomiques de Strasbourg.RetrievedOctober 24,2018.
- ^Abt, Helmut A.; Boonyarak, Chayan (November 2004), "Tidal Effects in Binaries of Various Periods",The Astrophysical Journal,616(1): 562–566,Bibcode:2004ApJ...616..562A,doi:10.1086/423795.
- ^Abt, Helmut A. (August 2005), "Observed Orbital Eccentricities",The Astrophysical Journal,629(1): 507–511,Bibcode:2005ApJ...629..507A,doi:10.1086/431207.
