HD 128333

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HD 128333
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes
Right ascension 14h 34m 39.6205s
Declination +49° 22′ 06.075″
Apparent magnitude (V) 5.754
Spectral type M1IIIab
U−B color index 1.88
B−V color index 1.56
R−I color index 0.72
Variable type Variable star
Radial velocity (Rv) -20.1 km/s
Proper motion (μ) RA: -45.83 mas/yr
Dec.: 50.41 mas/yr
Parallax (π) 4.17 ± 0.6 mas
Distance approx. 800 ly
(approx. 240 pc)
Absolute magnitude (MV) 7.348
Mass 0.4 M
Radius 0.5 R
Luminosity 0.04 L
Temperature 2,000–3,500 K
Other designations
CH Boötis, BD+50 2095, FK5 3155, HIP 71280, SAO 45121, HR 5452.
Database references
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

HD 128333 or CH Boötis is a variable star in the constellation Boötes.