R Aquilae

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R Aquilae
Observation data
Epoch J2000      Equinox J2000
Constellation Aquila
Right ascension 19h 06m 22.2514s
Declination +08° 13′ 48.007″
Apparent magnitude (V) 6.09[1]
Characteristics
Spectral type M6.5-9e[1]
U−B color index 0.37[1]
B−V color index 1.60[1]
Variable type Mira[2]
Astrometry
Radial velocity (Rv) 34.60[1] km/s
Proper motion (μ) RA: 3.79[1] mas/yr
Dec.: -67.01[1] mas/yr
Parallax (π) 2.37 ± 0.87[1] mas
Distance approx. 1,400 ly
(approx. 400 pc)
Absolute magnitude (MV) −2.04
Other designations
BD+08 3970, HD 177940, HIP 93820, HR 7243, SAO 124266.
Database references
SIMBAD data
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

R Aquilae is a Mira variable in the constellation Aquila. Over a period of approximately 270 days, the apparent magnitude of this star varies from 5.5 to 12.[2] The period was over 300 days when first observed, and has declined steadily since.[3]


References[edit]

  1. ^ a b c d e f g h "R Aquilae". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 23 June 2014. 
  2. ^ a b VSX; Otero, Sebastian (4 January 2011). "R Aquilae". AAVSO Website. American Association of Variable Star Observers. Retrieved 21 December 2013. 
  3. ^ Greaves, J; Howarth, J. J. (June 2000). "Further investigations of R Aquilae". Journal of the British Astronomical Association. 110 (3): 131–142. Bibcode:2000JBAA..110..131G.