Astronomy:25 Arietis
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Cetus |
| Right ascension | 02h 27m 23.38951s[1] |
| Declination | +10° 11′ 53.9679″[1] |
| Apparent magnitude (V) | 6.45[2] |
| Characteristics | |
| Spectral type | F5 V[3] |
| B−V color 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 ± 0.0412[1] mas |
| Distance | 119.1 ± 0.2 ly (36.52 ± 0.05 pc) |
| 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 (log g) | 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 Arietis is a star in the equatorial constellation of Cetus, near the modern constellation boundary with Aries for which it is named. 25 Arietis is the Flamsteed designation. It has an apparent visual magnitude of 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 annual parallax shift of 27.38 mas,[1] which yields a separation of 119 light years. The star is moving closer to the Earth with a heliocentric radial velocity of −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 high proper motion, traversing the celestial sphere at the rate of 0.359″ per year.[7]
This is an ordinary F-type main-sequence star with a stellar classification of F5 V.[3] It is about 1.6[4] billion years old with an estimated 1.19[4] times the mass of the Sun and 1.44[1] times the Sun's radius. The star is radiating 2.9[1] times the Sun's luminosity from its photosphere at an effective temperature of around 6,274 K.[1]
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 Eggen, O. J. (1962), "Space-velocity vectors for 3483 stars with proper motion and radial velocity", Royal Observatory Bulletin 51: 79, Bibcode: 1962RGOB...51...79E.
- ↑ 4.0 4.1 4.2 4.3 4.4 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, doi:10.1088/0004-637X/804/2/146, Bibcode: 2015ApJ...804..146D.
- ↑ 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, doi:10.1051/0004-6361/201016276, Bibcode: 2011A&A...530A.138C.
- ↑ "25 Ari". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=25+Ari.
- ↑ 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, doi:10.1086/427854, Bibcode: 2005AJ....129.1483L.
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