E Centauri

This article is about E Centauri. Not to be confused with e Centauri or ε Centauri.
E Centauri
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Centaurus
Right ascension 12h 08m 14.70518s[1]
Declination −48° 41′ 33.0323″[1]
Apparent magnitude (V) +5.34[2]
Characteristics
Spectral type B9.5/A0V[3]
B−V color index −0.010±0.007[2]
Astrometry
Radial velocity (Rv)+7.2±0.5[2] km/s
Proper motion (μ) RA: −27.271[1] mas/yr
Dec.: −7.342[1] mas/yr
Parallax (π)5.8040 ± 0.2042 mas[1]
Distance560 ± 20 ly
(172 ± 6 pc)
Absolute magnitude (MV)−0.97[2]
Details
Mass3.38±0.09[4] M☉
Radius5.835[5] R☉
Luminosity302+39
−35[4] L☉
Surface gravity (log g)3.16[5] cgs
Temperature9,886±69[4] K
Rotational velocity (v sin i)74[4] km/s
Other designations
E Cen, CD−47°7396, FK5 446, GC 16581, HD 105416, HIP 59184, HR 4620, SAO 223235[6]
Database references
SIMBADdata

E Centauri is a single[7] star in the southern constellation of Centaurus. It is a white-hued star that is dimly visible to the naked eye with an apparent visual magnitude of +5.34.[2] The distance to this object is approximately 560 light years based on parallax, and it has an absolute magnitude of −0.97.[2] It is drifting closer to the Sun with a radial velocity of +7 km/s,[2] and it is a candidate member of the Lower Centaurus Crux subgroup of the Sco OB2 association.[8]

This is a late B- or early A-type main-sequence star with a stellar classification of B9.5/A0V,[3] which indicates it is generating energy via core hydrogen fusion. It has 3.4[4] times the mass of the Sun and is spinning with a projected rotational velocity of 74 km/s.[4] The star is radiating 302[4] times the luminosity of the Sun from its photosphere at an effective temperature of 9,886 K.[4]

  1. ^ a b c d e Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f g Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1978 was invoked but never defined (see the help page).
  4. ^ a b c d e f g h Cite error: The named reference zorec2012 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference mcdonald2012 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Hoogerwerf2000 was invoked but never defined (see the help page).