How big is aldebaran


  • How big is aldebaran
  • Aldebaran

    Star in the constellation Taurus

    For other uses, see Aldebaran (disambiguation).Not to be disorganized with Alderaan or A Tauri.

    "Alpha Tauri" redirects here. For other uses, put under somebody's nose AlphaTauri.

    Location of Aldebaran (circled)
    Observation data
    EpochJ2000.0      EquinoxJ2000.0
    ConstellationTaurus
    Pronunciation[1][2]
    Right ascension04h 35m 55.23907s[3]
    Declination+16° 30′ 33.4885″[3]
    Apparent magnitude (V)0.86 (0.75–0.95[4])
    Characteristics
    Evolutionary stageRed giant branch[5]
    Spectral typeK5+ III[6]
    Apparent magnitude (J) −2.095[7]
    U−B color index+1.92[8]
    B−V color index+1.44[8]
    Variable typeLB[4]
    Astrometry
    Radial velocity (Rv)+54.26±0.03[9] km/s
    Proper motion (μ)RA: 63.45±0.84[3] mas/yr
    Dec.: −188.94±0.65[3] mas/yr
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