25 Arietis
| Observation data EpochJ2000.0EquinoxJ2000.0 | |
|---|---|
| Constellation | Cetus |
| Right ascension | 02h27m23.38951s[1] |
| Declination | +10° 11′ 53.9679″[1] |
| Apparent magnitude(V) | 6.45[2] |
| Characteristics | |
| Spectral type | F5 V[3] |
| B−Vcolor index | 0.450±0.007[2] |
| Astrometry | |
| Radial velocity(Rv) | −39.54±0.25[1]km/s |
| Proper motion(μ) | RA:−293.750[1]mas/yr Dec.:−203.157[1]mas/yr |
| Parallax(π) | 27.3827 ± 0.0412mas[1] |
| Distance | 119.1 ± 0.2ly (36.52 ± 0.05pc) |
| Absolute magnitude(MV) | +3.60[2] |
| Details | |
| Mass | 1.19[4]M☉ |
| Radius | 1.44±0.05[1]R☉ |
| Luminosity | 2.892+0.006 −0.007[1]L☉ |
| Surface gravity(logg) | 4.30[4]cgs |
| Temperature | 6,274+119 −105[1]K |
| Metallicity[Fe/H] | −0.19[5]dex |
| Age | 1.598[4]Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
25 Arietisis astarin theequatorialconstellationofCetus,near the modern constellation boundary withAriesfor which it is named.25 Arietisis theFlamsteed designation.It has anapparent visual magnitudeof 6.45,[2]placing it near the lower limit of visibility to the naked eye. The distance to this star can be estimated from its annualparallax shiftof27.38 mas,[1]which yields a separation of 119light years.The star is moving closer to the Earth with a heliocentricradial velocityof −40 km/s,[1]and is predicted to come as close as 102.8 light-years in 259,000 years.[2]It has a relatively highproper motion,traversing thecelestial sphereat the rate of0.359″per year.[7]
This is an ordinaryF-type main-sequence starwith astellar classificationof F5 V.[3]It is about 1.6[4]billion years old with an estimated 1.19[4]times themass of the Sunand 1.44[1]times theSun's radius.The star is radiating 2.9[1]times theSun's luminosityfrom itsphotosphereat aneffective temperatureof around 6,274 K.[1]
References
[edit]- ^abcdefghijklmnBrown, 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.
- ^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.
- ^abEggen, O. J. (1962), "Space-velocity vectors for 3483 stars with proper motion and radial velocity",Royal Observatory Bulletin,51:79,Bibcode:1962RGOB...51...79E.
- ^abcdeDavid, 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.
- ^Casagrande, L.; et al. (June 2011), "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey",Astronomy and Astrophysics,530:A138,arXiv:1103.4651,Bibcode:2011A&A...530A.138C,doi:10.1051/0004-6361/201016276,S2CID56118016.
- ^"25 Ari".SIMBAD.Centre de données astronomiques de Strasbourg.RetrievedDecember 29,2018.
- ^Lépine, Sébastien; Shara, Michael M. (March 2005), "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog) ",The Astronomical Journal,129(3): 1483–1522,arXiv:astro-ph/0412070,Bibcode:2005AJ....129.1483L,doi:10.1086/427854,S2CID2603568.
