Omega Boötis

Omega Boötis

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Boötes
Right ascension	Template:RA
Declination	Template:DEC
Apparent magnitude (V)	+4.82
Characteristics
Spectral type	K4 III
U−B Template:Engvar	+1.83
B−V Template:Engvar	+1.50
Astrometry
Radial velocity (Rv)	km/s
Proper motion (μ)	RA: −5.535 mas/yr Dec.: −49.18 mas/yr
Parallax (π)	8.5271±0.1118 mas
Distance	Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)	−0.41
Details
Mass	1.65 Template:Solar mass
Radius	Template:Solar radius
Luminosity	Template:Solar luminosity
Surface gravity (log g)	cgs
Temperature	K
Metallicity [Fe/H]	dex
Age	2.99 Gyr
Metallicity [Fe/H]	{{{metal_fe2}}} dex
Other designations
Template:Odlist
Database references
SIMBAD	data

Omega Boötis is a solitary, orange-hued star in the northern constellation of Boötes. Its name is a Bayer designation that is Latinized from ω Boötis, and abbreviated Omega Boo or ω Boo. This is a dim star but visible to the naked eye with an apparent visual magnitude of +4.82. Based upon an annual parallax shift of as seen from the Earth, it is located about from the Sun. The star is drifting further away with a radial velocity of +12.5 km/s.

This star is three billion years old with a stellar classification of K4 III, matching an evolved K-type giant star that has consume the supply of hydrogen at its core. It has an estimated 1.65 times the mass of the Sun and has expanded to 39 times the Sun's radius. The star is radiating 340 times the Sun's luminosity from its photosphere at an effective temperature of about 3,994 K.