Tau5 Serpentis, Latinized from τ5 Serpentis, is a star in the constellation of Serpens. The Flamsteed designation for this star is 18 Serpentis.[3] It has an apparent visual magnitude of 5.93,[2] which is bright enough to be dimly visible to the naked eye. The star is located at a distance of 169 light years from the Sun based on parallax measurements.[1]
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Serpens |
| Right ascension | 15h 36m 29.240s[1] |
| Declination | +16° 07′ 08.70″[1] |
| Apparent magnitude (V) | 5.93[2] |
| Characteristics | |
| Spectral type | F3V[3] |
| U−B color index | +0.04[4] |
| B−V color index | +0.354±0.004[2] |
| Astrometry | |
| Radial velocity (Rv) | −2.0±3.7[5] km/s |
| Proper motion (μ) | RA: 72.175 mas/yr[1] Dec.: −5.217 mas/yr[1] |
| Parallax (π) | 19.2694 ± 0.0392 mas[1] |
| Distance | 169.3 ± 0.3 ly (51.9 ± 0.1 pc) |
| Absolute magnitude (MV) | +2.35[2] |
| Details | |
| Mass | 1.54[5] M☉ |
| Luminosity | 10[2] L☉ |
| Surface gravity (log g) | 3.96[5] cgs |
| Temperature | 6,903±80[5] K |
| Metallicity [Fe/H] | −0.20[5] dex |
| Rotational velocity (v sin i) | 88±10[6] km/s |
| Age | 1.90[5] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
The stellar classification of this star is F3V,[3] matching an F-type main-sequence star. It has 1.54 times the mass of the Sun[5] and is radiating 10[2] times the Sun's luminosity from its photosphere at an effective temperature of 6,903 K.[5] The star has an estimated age of 1.9 billion years[5] and is spinning with a projected rotational velocity of about 88 km/s.[6] It is metal poor, which means the abundance of iron in the stellar atmosphere is lower than in the Sun.[5]
References
edit- ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ a b c d e f Anderson, 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, S2CID 119257644.
- ^ a b c d "tau05 Ser", SIMBAD, Centre de données astronomiques de Strasbourg, retrieved 2024-10-24.
- ^ HR 5804, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line September 19, 2008.
- ^ a b c d e f g h i j Casagrande, L.; et al. (May 26, 2011), "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s): Improved astrophysical parameters for the Geneva-Copenhagen Survey", Astronomy & Astrophysics, 530: A138, arXiv:1103.4651, Bibcode:2011A&A...530A.138C, doi:10.1051/0004-6361/201016276, eISSN 1432-0746, ISSN 0004-6361.
- ^ a b Glebocki, R.; Gnacinski, P. (2005), "Catalog of Stellar Rotational Velocities (Glebocki+ 2005)", VizieR On-Line Data Catalog: III/244. Originally Published in: 2005csss...13..571G, 3244, Bibcode:2005yCat.3244....0G.
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