Epsilon Doradus

Epsilon Doradus
Location of ε Doradus (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Dorado
Right ascension 05h 49m 53.52107s[1]
Declination −66° 54′ 04.2787″[1]
Apparent magnitude (V) 5.11[2]
Characteristics
Spectral type B6 V[3]
U−B color index −0.49[2]
B−V color index −0.14[2]
Variable type SPB[4]
Astrometry
Radial velocity (Rv)+15.5±1.6[5] km/s
Proper motion (μ) RA: −21.81[1] mas/yr
Dec.: +37.55[1] mas/yr
Parallax (π)5.68 ± 0.15 mas[1]
Distance570 ± 20 ly
(176 ± 5 pc)
Absolute magnitude (MV)−0.20[6]
Details
Mass4.31±0.05[7] M☉
Radius3.8±0.6[4] R☉
Luminosity556[7] L☉
Surface gravity (log g)3.89±0.20[4] cgs
Temperature13,212[7] K
Rotational velocity (v sin i)17[7] km/s
Age210[6] Myr
Other designations
ε Dor, CD−66°351, Gaia DR2 4659664312127365632, HD 39844, HIP 27534, HR 2064, SAO 249368, 2MASS J05495356-6654041[8]
Database references
SIMBADdata

Epsilon Doradus, Latinzied from ε Doradus, is a solitary[9] star located in the southern constellation of Dorado. It is visible to the naked eye with an apparent visual magnitude of 5.11.[2] Based upon an annual parallax shift of 5.68 mas as measured from Earth, it is located roughly 570 light years from the Sun. At that distance, the visual magnitude of the star is diminished by an extinction factor of 0.09 due to interstellar dust.[6]

This is a B-type main sequence star with a stellar classification of B6 V.[3] It is a slowly pulsating B-type star with a mean longitudinal magnetic field strength of −64±26 G.[4] With 4.31[7] times the mass of the Sun and 3.8[4] times the Sun's radius, it is about 85% of the way through its main sequence lifetime.[7] The star is an estimated 210[6] million years old and is spinning with a projected rotational velocity of 17 km/s.[7] Epsilon Doradus radiates 556 times the solar luminosity from its photosphere at an effective temperature of 13,212 K.[7]

  1. ^ a b c d e Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1979 was invoked but never defined (see the help page).
  4. ^ a b c d e Cite error: The named reference Hubrig2009 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).
  7. ^ a b c d e f g h Cite error: The named reference Zorec2012 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).