9 Boötis

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9 Boötis
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes
Right ascension 13h 56m 34.1811s
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[edit]