R Boötis

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R Boötis
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes
Right ascension 14h 37m 11.5766s[1]
Declination 26° 44′ 11.681″[1]
Apparent magnitude (V) 6.20[1]
Spectral type M4-8e[1]
B−V color index 3.57[1]
Variable type Mira variable[2]
Radial velocity (Rv) -58.00[1] km/s
Proper motion (μ) RA: -25.59[1] mas/yr
Dec.: 14.36[1] mas/yr
Parallax (π) -1.34 ± 1.49[1] mas
Other designations
HIP 71490, SAO 83440, BD+27° 2400, HD 128609.
Database references
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

R Boötis is a Mira variable in the constellation Boötes. It ranges between magnitudes 6.2 and 13.1 over a period of approximately 223 days.[2]


  1. ^ a b c d e f g h i "R Canum Venaticorum". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 26 June 2014. 
  2. ^ a b VSX (4 January 2010). "R Boötis". AAVSO Website. American Association of Variable Star Observers. Retrieved 26 June 2014. 

Coordinates: Sky map 14h 37m 11.5787s, +26° 44′ 11.663″