R Boötis

R Boötis

Observation data Epoch J2000      Equinox J2000
Constellation	Boötes
Right ascension	14^h 37^m 11.5766^s[1]
Declination	26° 44′ 11.681″[1]
Apparent magnitude (V)	6.20[1]
Characteristics
Spectral type	M4-8e[1]
B−V color index	3.57[1]
Variable type	Mira variable[2]
Astrometry
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
SIMBAD	data
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]

References

1. "R Canum Venaticorum". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 26 June 2014.
2. VSX (4 January 2010). "R Boötis". AAVSO Website. American Association of Variable Star Observers. Retrieved 26 June 2014.

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