Tau8 Serpentis

For other stars with this Bayer designation, see Tau Serpentis.
Tau8 Serpentis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Serpens
Right ascension 15h 44m 42.1323s[1]
Declination +17° 15′ 51.197″[1]
Apparent magnitude (V) 6.144[1]
Characteristics
Spectral type A0V[1]
U−B color index −0.03[2]
B−V color index 0.00[2]
Astrometry
Radial velocity (Rv)−5.2 ± 5[1] km/s
Proper motion (μ) RA: −30.44[1] mas/yr
Dec.: 6.59[1] mas/yr
Parallax (π)10.16 ± 0.79 mas[1]
Distance320 ± 20 ly
(98 ± 8 pc)
Absolute magnitude (MV)0.88[3]
Details
Radius2.0[4] R☉
Rotational velocity (v sin i)76[2] km/s
Other designations
τ8 Ser, Tau8 Ser, 26 Serpentis, BD+17° 2906, GC 21164, HD 140729, HIP 77111, HR 5858, SAO 101712, PPM 131656[1]
Database references
SIMBADdata

Tau8 Serpentis, Latinized from τ8 Serpentis, is an A-type main sequence star in the constellation of Serpens, approximately 320 light-years from the Earth.[1] It has an apparent visual magnitude of approximately 6.144.[1] Although it was observed to be binary by speckle interferometry in 1985, subsequent observations show no sign of binarity, and the detection appears to have been spurious.[5]

  1. ^ a b c d e f g h i j k * 26 Ser -- Star, database entry, SIMBAD. Accessed on line September 19, 2008.
  2. ^ a b c 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.
  3. ^ 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.
  4. ^ HD 140729, database entry, Catalog of Apparent Diameters and Absolute Radii of Stars (CADARS), 3rd edition, L. E. Pasinetti-Fracassini, L. Pastori, S. Covino, and A. Pozzi, CDS ID II/224. Accessed on line September 19, 2008.
  5. ^ ICCD speckle observations of binary stars. X - A further survey for duplicity among the bright stars, Harold A. McAlister, Brian D. Mason, William I. Hartkopf, and Michael M. Shara, Astronomical Journal 106, #4 (October 1993), pp. 1639–1655, doi:10.1086/116753, Bibcode:1993AJ....106.1639M.