Aja viide. Aja lugu.

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]

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

^ ^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.