6 Boötis

6 Boötis

File:6 Boötis.jpg 6 Boötis in optical light.
Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Boötes
Right ascension	Template:RA
Declination	Template:DEC
Apparent magnitude (V)	4.92
Characteristics
Spectral type	K4 III + M8 V
B−V Template:Engvar	Template:Val
Astrometry
Radial velocity (Rv)	Template:Val km/s
Proper motion (μ)	RA: +33.773 mas/yr Dec.: +10.842 mas/yr
Parallax (π)	7.1527±0.3659 mas
Distance	Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)	−0.49
Orbit
Period (P)	Template:Val
Eccentricity (e)	Template:Val
Periastron epoch (T)	Template:Val
Argument of periastron (ω) (secondary)	Template:Val°
Semi-amplitude (K1) (primary)	Template:Val km/s
Details
Radius	38 Template:Solar radius
Luminosity	430.124 Template:Solar luminosity
Surface gravity (log g)	1.910 cgs
Temperature	4,050 K
Metallicity [Fe/H]	−0.24 dex
Rotational velocity (v sin i)	2.0 km/s
Metallicity [Fe/H]	{{{metal_fe2}}} dex
Other designations
Template:Odlist
Database references
SIMBAD	data

6 Boötis is a binary star system in the northern constellation of Boötes, located around 460 light years away from the Sun. It has the Bayer designation e Boötis; 6 Boötis is the Flamsteed designation. The system is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.92. It is moving closer to the Earth with a heliocentric radial velocity of −3 km/s.

This is a single-lined spectroscopic binary system with an orbital period of Template:Convert and an eccentricity of 0.4. The visible component is an evolved giant star with a stellar classification of K4 III. Its measured angular diameter is Template:Val. At the estimated distance of the star, this yields a physical size of about 38 times the radius of the Sun. The star is radiating 430 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,050 K. Its companion is probably a low mass red dwarf of around class M8 V.