Beta Doradus

β Doradus
Location of β Doradus (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Dorado
Right ascension 05h 33m 37.51253s[1]
Declination −62° 29′ 23.3231″[1]
Apparent magnitude (V) 3.46 to 4.08[2]
Characteristics
Spectral type F4-G4Ia-II[3]
U−B color index +0.55[3]
B−V color index +0.70[4]
R−I color index +0.48[4]
Variable type δ Cephei[2]
Astrometry
Radial velocity (Rv)+7.2[5] km/s
Proper motion (μ) RA: +0.800[1] mas/yr
Dec.: +9.458[1] mas/yr
Parallax (π)3.14 ± 0.16 mas[6]
Distance1,040 ± 50 ly
(320 ± 20 pc)
Absolute magnitude (MV)−3.91±0.11[7]
Details
Mass7.7±0.2[8] M☉
Radius67.8±0.7[9] R☉
Luminosity3,200[7] L☉
Surface gravity (log g)1.3[10] cgs
Temperature5,445[7] K
Metallicity [Fe/H]–0.13[10] dex
Rotational velocity (v sin i)0[3] km/s
Age42.5±2.7[8] Myr
Other designations
β Dor, Beta Doradus, Beta Dor, CD−62 214, CPD−62 487, FK5 212, GC 6944, HD 37350, HIP 26069, HR 1922, SAO 249311, PPM 354837[11]
Database references
SIMBADdata

Beta Doradus, Latinized from β Doradus, is the second brightest star in the southern constellation of Dorado.[12] It is a Classical Cepheid variable, with an apparent magnitude that varies between 3.46 to 4.08.[2] Based upon parallax measurements with the Hubble Space Telescope, it is located at a distance of 1,040 light-years (320 parsecs) from Earth.[6]

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