Tau⁶ Serpentis

Tau⁶ Serpentis, Latinized from τ⁶ Serpentis, is a G-type giant star in the constellation of Serpens, approximately 450 light-years from the Earth.[1] It has an apparent visual magnitude of approximately 6.000,[1] and is a member of the Ursa Major Stream.[2]

τ⁶ Serpentis

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Serpens
Right ascension	15^h 40^m 59.1008^s[1]
Declination	+16° 01′ 28.517″[1]
Apparent magnitude (V)	6.000[1]
Characteristics
Spectral type	G8III[1]
U−B color index	+0.61[2]
B−V color index	+0.90[2]
R−I color index	+0.46[2]
Astrometry
Radial velocity (Rv)	3.4 ± 0.9[1] km/s
Proper motion (μ)	RA: 22.16[1] mas/yr Dec.: −16.80[1] mas/yr
Parallax (π)	7.24 ± 0.79[1] mas
Distance	approx. 450 ly (approx. 140 pc)
Absolute magnitude (MV)	−0.33[3]
Details
Radius	11[4] R☉
Luminosity	150[3] L☉
Metallicity [Fe/H]	−0.08±0.04[3] dex
Other designations
τ^6 Ser, 19 Serpentis, BD+16° 2816, GC 21089, HD 140027, HIP 76810, HR 5840, SAO 101678, PPM 131601 τ^6 Ser, Tau^6 Serpentis, Tau^6 Ser, 19 Serpentis, 19 Ser, BD+16 2816, GC 21089, HD 140027, HIP 76810, HR 5840, PPM 131601, SAO 101678.[1]
Database references
SIMBAD	data

References

1. * 19 Ser -- Star, database entry, SIMBAD. Accessed on line September 19, 2008.
2. 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.
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.
4. HD 140027, 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.