9 Boötis

9 Boötis

Observation data Epoch J2000      Equinox J2000
Constellation	Boötes
Right ascension	13^h 56^m 34.1811^s
Declination	+27° 29′ 31.496″
Apparent magnitude (V)	5.019
Characteristics
Spectral type	K3III
U−B color index	1.72
B−V color index	1.42
R−I color index	0.75
Variable type	Irregular
Astrometry
Radial velocity (Rv)	-39.8 km/s
Proper motion (μ)	RA: 28.19 mas/yr Dec.: -47.76 mas/yr
Parallax (π)	5.03 ± 0.78 mas
Distance	approx. 600 ly (approx. 200 pc)
Absolute magnitude (MV)	6.487
Details
Mass	0,8 M☉
Radius	0,9 R☉
Luminosity	0,4 L☉
Temperature	3,500–5,000 K
Rotation	< 19 km/s 0,006574611 Year
Other designations
HR 5247, HD 121710, BD+28°2278, HIP 68103, SAO 83084, GC 18850.
Database references
SIMBAD	data
Data sources:
Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.)

9 Boötis is a variable star in the constellation Boötes.

9 Boötis is an orange K-type giant with an apparent magnitude of +5.02. It is approximately 648 light years from Earth.

References

• HR 5247
• Image 9 Boötis