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Star in the constellation Serpens
τ6 Serpentis
Observation dataEpoch J2000.0 Equinox J2000.0 (ICRS )
Constellation
Serpens [ 1]
Right ascension 15h 40m 59.1008s [ 2]
Declination
+16° 01′ 28.517″[ 2]
Apparent magnitude (V)6.000[ 2]
Characteristics
Spectral type
G8III[ 2]
U−B color index
+0.61[ 3]
B−V color index
+0.90[ 3]
R−I color index
+0.46[ 3]
Astrometry Radial velocity (Rv )± 0.9[ 2] km/s Proper motion (μ) RA: 22.16[ 2] mas /yr Dec.: −16.80[ 2] mas /yr Parallax (π)7.24± 0.79 mas [ 2] Distance approx. 450 ly pc ) Absolute magnitude (MV )−0.33[ 1] Details Mass 3.2[ 4] M ☉ Radius 15[ 4] R ☉ Luminosity 137[ 4] L ☉ Surface gravity (log g )2.64[ 4] cgs Temperature 5,126[ 4] K Metallicity [Fe/H] −0.01[ 4] dex Rotational velocity (v sin i )4,5[ 5] Age 310[ 4] Myr Other designations τ6 Ser , 19 Serpentis , BD +16°2816GC 21089HD 140027HIP 76810HR 5840SAO 101678PPM 1316016 Ser, Tau6 Serpentis, Tau6 Ser, 19 Serpentis , 19 Ser, BD +16 2816, GC 21089, HD 140027, HIP 76810, HR 5840, PPM 131601, SAO 101678.[ 2] Database references SIMBAD data
Tau6 Serpentis , Latinized from τ6 Serpentis , is a G-type giant star in the constellation of Serpens , approximately 450 light-years from the Earth .[ 2] apparent visual magnitude of approximately 6.000,[ 2] Ursa Major Stream .[ 3]
^ a b 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 e f g h i j k * 19 Ser -- Star , database entry, SIMBAD . Accessed on line September 19, 2008.^ a b c d HR 5840 , database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50 . Accessed September 19, 2008.^ a b c d e f g Reffert, Sabine; Bergmann, Christoph; Quirrenbach, Andreas; Trifonov, Trifon; Künstler, Andreas (2015). "Precise radial velocities of giant stars. VII. Occurrence rate of giant extrasolar planets as a function of mass and metallicity". Astronomy and Astrophysics . 574 : A116. arXiv :1412.4634 Bibcode :2015A&A...574A.116R . doi :10.1051/0004-6361/201322360 . ^ Hekker, S.; Meléndez, J. (2007). "Precise radial velocities of giant stars. III. Spectroscopic stellar parameters". Astronomy and Astrophysics . 475 (3): 1003. arXiv :0709.1145 Bibcode :2007A&A...475.1003H . doi :10.1051/0004-6361:20078233 .
