Tau3 Serpentis, Latinized from τ3 Serpentis, is a giant star in the constellation of Serpens. It has an apparent visual magnitude of approximately 6.11,[2] which is bright enough to be dimly visible to the naked eye under favorable viewing conditions. The distance to this star is approximately 358 light years based on parallax measurements, but it is drifting closer with a heliocentric radial velocity of −22 km/s.[7]
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Serpens |
| Right ascension | 15h 35m 33.230s[1] |
| Declination | +17° 39′ 20.00″[1] |
| Apparent magnitude (V) | 6.10[2] |
| Characteristics | |
| Spectral type | G8III:[3] |
| B−V color index | +0.975±0.006[2] |
| Astrometry | |
| Radial velocity (Rv) | −22.3±2.9[4] km/s |
| Proper motion (μ) | RA: −77.745 mas/yr[1] Dec.: −13.437 mas/yr[1] |
| Parallax (π) | 9.1014 ± 0.0329 mas[1] |
| Distance | 358 ± 1 ly (109.9 ± 0.4 pc) |
| Absolute magnitude (MV) | +0.78[2] |
| Details | |
| Luminosity | 50[5] L☉ |
| Temperature | 4,983[5] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
The stellar classification of this star is G8III:,[3] which matches a G-type giant star. However, the trailing colon ':' indicates some uncertainty in the classification. It is radiating 50 times the luminosity of the Sun from its photosphere at an effective temperature of 4,983 K.[5]
References
edit- ^ a b c d 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 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 Adams, Walter S.; et al. (April 1935), "The Spectroscopic Absolute Magnitudes and Parallaxes of 4179 Stars", The Astrophysical Journal, 81: 187, Bibcode:1935ApJ....81..187A, doi:10.1086/143628, eISSN 1538-4357, ISSN 0004-637X.
- ^ Gontcharov, G. A. (2006), "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system", Astronomy Letters, 32 (11): 759–771, arXiv:1606.08053, Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065, S2CID 119231169.
- ^ a b c McDonald, I.; et al. (November 21, 2012), "Fundamental parameters and infrared excesses of Hipparcos stars: Parameters and IR excesses from Hipparcos", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–357, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, eISSN 1365-2966, ISSN 0035-8711.
- ^ "tau03 Ser", SIMBAD, Centre de données astronomiques de Strasbourg, retrieved 2024-10-24.
- ^ Wilson, Ralph Elmer (1953), "General catalogue of stellar radial velocities", Washington, Carnegie Institution of Washington: 0, Bibcode:1953GCRV..C......0W.
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