R Boötis

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]
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
Distanceapprox. −2,000 ly
(approx. −700 pc)
Other designations
HIP 71490, SAO 83440, BD+27° 2400, HD 128609.
Database references
SIMBADdata
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. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 "R Canum Venaticorum". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 26 June 2014.
  2. ↑ 2.0 2.1 VSX (4 January 2010). "R Boötis". AAVSO Website. American Association of Variable Star Observers. Retrieved 26 June 2014.

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