Tau6 Serpentis

τ⁶ Serpentis
Observation data; Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Serpens
Right ascension	15h 40m 59.1008s
Declination	+16° 01′ 28.517″
Apparent magnitude (V)	6.000
Characteristics
Spectral type	G8III
U−B color index	+0.61
B−V color index	+0.90
R−I color index	+0.46
Astrometry
Radial velocity (Rv)	3.4±0.9 km/s
Proper motion (μ)	RA: 22.16 mas/yr ; Dec.: −16.80 mas/yr
Parallax (π)	7.24±0.79 mas
Distance	approx. 450 ly ; (approx. 140 pc)
Absolute magnitude (MV)	−0.33
Details
Mass	3.2 M☉
Radius	15 R☉
Luminosity	137 L☉
Surface gravity (log g)	2.64 cgs
Temperature	5,126 K
Metallicity [Fe/H]	−0.01 dex
Rotational velocity (v sin i)	4,5 km/s
Age	310 Myr
Other designations
	τ6 Ser, 19 Serpentis, BD+16°2816, GC 21089, HD 140027, HIP 76810, HR 5840, SAO 101678, PPM 131601 τ6 Ser, Tau6 Serpentis, Tau6 Ser, 19 Serpentis, 19 Ser, BD+16 2816, GC 21089, HD 140027, HIP 76810, HR 5840, PPM 131601, SAO 101678.
Database references
SIMBAD	data

Tau⁶ Serpentis, Latinized from τ⁶ Serpentis, is a G-type giant star in the constellation of Serpens, approximately 450 light-years from the Earth.^[2] It has an apparent visual magnitude of approximately 6.000,^[2] and is a member of the Ursa Major Stream.^[3]

References

^ ^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 ^g ^h ⁱ ^j ^k * 19 Ser -- Star, database entry, SIMBAD. Accessed on line September 19, 2008.
^ ^a ^b ^c ^d 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.
^ ^a ^b ^c ^d ^e ^f ^g Reffert, Sabine; Bergmann, Christoph; Quirrenbach, Andreas; Trifonov, Trifon; Künstler, Andreas (2015). "Precise radial velocities of giant stars. VII. Occurrence rate of giant extrasolar planets as a function of mass and metallicity". Astronomy and Astrophysics. 574: A116. arXiv:1412.4634. Bibcode:2015A&A...574A.116R. doi:10.1051/0004-6361/201322360.
^ Hekker, S.; Meléndez, J. (2007). "Precise radial velocities of giant stars. III. Spectroscopic stellar parameters". Astronomy and Astrophysics. 475 (3): 1003. arXiv:0709.1145. Bibcode:2007A&A...475.1003H. doi:10.1051/0004-6361:20078233.

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Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Serpens^[1]
Right ascension	15^h 40^m 59.1008^s^[2]
Declination	+16° 01′ 28.517″^[2]
Apparent magnitude (V)	6.000^[2]
Characteristics
Spectral type	G8III^[2]
U−B color index	+0.61^[3]
B−V color index	+0.90^[3]
R−I color index	+0.46^[3]
Astrometry

Radial velocity (R_v)	3.4±0.9^[2] km/s
Proper motion (μ)	RA: 22.16^[2] mas/yr Dec.: −16.80^[2] mas/yr
Parallax (π)	7.24±0.79 mas^[2]
Distance	approx. 450 ly (approx. 140 pc)
Absolute magnitude (M_V)	−0.33^[1]

Details

Mass	3.2^[4] `M`_☉
Radius	15^[4] `R`_☉
Luminosity	137^[4] `L`_☉
Surface gravity (log g)	2.64^[4] cgs
Temperature	5,126^[4] K
Metallicity [Fe/H]	−0.01^[4] dex
Rotational velocity (v sin i)	4,5^[5] km/s
Age	310^[4] Myr

Other designations
τ⁶ Ser, 19 Serpentis, BD+16°2816, GC 21089, HD 140027, HIP 76810, HR 5840, SAO 101678, PPM 131601 τ⁶ Ser, Tau⁶ Serpentis, Tau⁶ Ser, 19 Serpentis, 19 Ser, BD+16 2816, GC 21089, HD 140027, HIP 76810, HR 5840, PPM 131601, SAO 101678.^[2]
Database references
SIMBAD	data