Tau8 Serpentis

For other stars with this Bayer designation, see Tau Serpentis.
τ8 Serpentis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Serpens
Right ascension --h --m --s[1]
Declination +17° 15′ 51.215″[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[1] mas
Distance320 ± 20 ly
(98 ± 8 pc)
Absolute magnitude (MV)1.2[3]
Details
Radius2.0[4] R☉
Rotational velocity (v sin i)76[2] km/s
Other designations
τ8 Ser, Tau8 Serpentis, Tau8 Ser, 26 Serpentis, 26 Ser, BD+17 2906, GC 21164, HD 140729, HIP 77111, HR 5858, PPM 131656, SAO 101712.[1]
Database references
SIMBADdata

Tau8 Serpentis (Tau8 Ser, τ8 Serpentis, τ8 Ser) 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]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 1.10 * 26 Ser -- Star, database entry, SIMBAD. Accessed on line September 19, 2008.
  2. ↑ 2.0 2.1 2.2 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. ↑ From apparent magnitude and parallax.
  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.