Astronomy:Tau3 Serpentis
| Observation data 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[1] mas/yr Dec.: −13.437[1] mas/yr |
| Parallax (π) | 9.1014 ± 0.0329[1] mas |
| Distance | 358 ± 1 ly (109.9 ± 0.4 pc) |
| Absolute magnitude (MV) | +0.78[2] |
| Details[1] | |
| Mass | 2.703+0.107 −0.040 M☉ |
| Radius | 9.68+0.20 −0.19 R☉ |
| Luminosity | 47.28+0.33 −0.31 L☉ |
| Surface gravity (log g) | 2.478±0.005 cgs |
| Temperature | 4,864±1 K |
| Age | 502+51 −69 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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.[6]
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. About 500 million years old and with 2.7 times the mass of the Sun, Tau3 Serpentis has expanded to 9.7 times the Sun's radius, and is radiating 47 times the luminosity of the Sun from its photosphere at an effective temperature of 4,864 K.[1]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 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 Adams, Walter S. et al. (April 1935), "The Spectroscopic Absolute Magnitudes and Parallaxes of 4179 Stars", The Astrophysical Journal 81: 187, doi:10.1086/143628, ISSN 0004-637X, Bibcode: 1935ApJ....81..187A.
- ↑ Gontcharov, G. A. (2006), "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system", Astronomy Letters 32 (11): 759–771, doi:10.1134/S1063773706110065, Bibcode: 2006AstL...32..759G.
- ↑ "tau03 Ser". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=tau03+Ser.
- ↑ Wilson, Ralph Elmer (1953), "General catalogue of stellar radial velocities", Washington (Carnegie Institution of Washington): 0, Bibcode: 1953GCRV..C......0W.
 |  |
