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Star in the constellation Serpens
Tau8 Serpentis
Observation dataEpoch J2000.0 Equinox J2000.0 (ICRS )
Constellation
Serpens [ 1]
Right ascension 15h 44m 42.1323s [ 2]
Declination
+17° 15′ 51.199″[ 2]
Apparent magnitude (V)6.1[ 3]
Characteristics
Evolutionary stage
main sequence [ 4]
Spectral type
A0V[ 5]
U−B color index
−0.03[ 6]
B−V color index
0.00[ 6]
Astrometry Radial velocity (Rv )± 0.53[ 2] km/s Proper motion (μ) RA: −28.655[ 2] mas /yr Dec.: +4.476[ 2] mas /yr Parallax (π)8.9643± 0.0409 mas [ 2] Distance 364 ± 2 ly pc ) Absolute magnitude (MV )0.88[ 1] Details Mass 2.5[ 7] M ☉ Radius 2.3[ 7] R ☉ Luminosity 44[ 7] L ☉ Surface gravity (log g )4.09[ 7] cgs Temperature 9,727[ 7] K Rotational velocity (v sin i )117[ 4] Other designations τ8 Ser, Tau8 Ser , 26 Serpentis , BD +17°2906GC 21164HD 140729HIP 77111HR 5858SAO 101712PPM 131656[ 5] Database references SIMBAD data
Tau8 Serpentis , Latinized from τ8 Serpentis , is an A-type main sequence star in the constellation of Serpens , approximately 364 light-years from the Earth .[ 5] apparent visual magnitude of approximately 6.144.[ 5] binary by speckle interferometry in 1985, subsequent observations show no sign of binarity, and the detection appears to have been spurious.[ 8]
^ 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 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties" . Astronomy and Astrophysics . 674 : A1. arXiv :2208.00211 Bibcode :2023A&A...674A...1G . doi :10.1051/0004-6361/202243940 S2CID 244398875 . Gaia DR3 record for this source at VizieR .^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics . 355 . Bibcode :2000A&A...355L..27H . ^ a b Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics . 537 : A120. arXiv :1201.2052 Bibcode :2012A&A...537A.120Z . doi :10.1051/0004-6361/201117691 . ^ a b c d * 26 Ser -- Star , database entry, SIMBAD . Accessed on line September 19, 2008.^ a b HR 5858 , 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 Stassun, Keivan G.; et al. (2019). "The Revised TESS Input Catalog and Candidate Target List" . The Astronomical Journal . 158 (4): 138. arXiv :1905.10694 Bibcode :2019AJ....158..138S . doi :10.3847/1538-3881/ab3467 ^ McAlister, Harold A.; Mason, Brian D.; Hartkopf, William I.; Shara, Michael M. (1993). "ICCD Speckle Observations of Binary Stars. X. A Further Survey for Duplicity Among the Bright Stars". The Astronomical Journal . 106 : 1639. Bibcode :1993AJ....106.1639M . doi :10.1086/116753 .
