Tau5 Serpentis

τ⁵ Serpentis

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Serpens
Right ascension	15^h 36^m 29.2391^s[1]
Declination	+16° 07′ 08.705″[1]
Apparent magnitude (V)	5.938[1]
Characteristics
Spectral type	F3V[1]
U−B color index	+0.04[2]
B−V color index	+0.29[2]
Astrometry
Radial velocity (Rv)	−2 ± 5[1] km/s
Proper motion (μ)	RA: 71.54[1] mas/yr Dec.: −5.54[1] mas/yr
Parallax (π)	20.40 ± 0.81[1] mas
Distance	160 ± 6 ly (49 ± 2 pc)
Absolute magnitude (MV)	2.49[3]
Details
Mass	1.52 (1.47 to 1.58)[4] M☉
Temperature	6900[4] K
Metallicity	[Fe/H] = −0.20[4]
Age	(1.6 ± 0.1) × 10^9  [4] years
Other designations
τ^5 Ser, Tau^5 Serpentis, Tau^5 Ser, 18 Serpentis, 18 Ser, BD+16 2807, GC 20985, HD 139225, HIP 76424, HR 5804, PPM 131544, SAO 101642.[1]
Database references
SIMBAD	data

Tau⁵ Serpentis (Tau⁵ Ser, τ⁵ Serpentis, τ⁵ Ser) is a F-type main sequence star in the constellation of Serpens, approximately 160 light-years from Earth.^[1] It has an apparent visual magnitude of approximately 5.938.^[1]

References

1. * 18 Ser -- Star, database entry, SIMBAD. Accessed on line September 19, 2008.
2. HR 5804, 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 139225, database entry, Geneva-Copenhagen Survey of the Solar neighbourhood, J. Holmberg et al., 2007, CDS ID V/117A. Accessed on line November 19, 2008.