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Theta Centauri information


Theta Centauri
Location of θ Centauri (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Centaurus
Right ascension 14h 06m 40.94752s[1]
Declination –36° 22′ 11.8371″[1]
Apparent magnitude (V) +2.06[2]
Characteristics
Spectral type K0 III[3]
U−B color index +0.90[2]
B−V color index +0.99[2]
Astrometry
Radial velocity (Rv)+1.3[4] km/s
Proper motion (μ) RA: –520.53[1] mas/yr
Dec.: –518.06[1] mas/yr
Parallax (π)55.45 ± 0.20 mas[1]
Distance58.8 ± 0.2 ly
(18.03 ± 0.07 pc)
Absolute magnitude (MV)0.87[5]
Details
Mass1.27[6] M
Radius10.6[7] R
Luminosity60[8] L
Surface gravity (log g)2.75[9] cgs
Temperature4,980[9] K
Metallicity [Fe/H]0.03[9] dex
Other designations
Menkent, θ Cen, Theta Cen, 5 Centauri, CD−35° 9260, FK5 520, HD 123139, HIP 68933, HR 5288, SAO 205188, LHS 2858[10]
Database references
SIMBADdata

Theta Centauri or θ Centauri, officially named Menkent (/ˈmɛŋkɛnt/),[11][12] is a single[6] star in the southern constellation of Centaurus, the centaur. With an apparent visual magnitude of +2.06,[2] it is the fourth-brightest member of the constellation. Based on parallax measurements obtained during the Hipparcos mission, it is about 58.8 light-years (18.0 parsecs) distant from the Sun.[1] It has a relatively high proper motion, traversing the celestial sphere at the rate of 0.73 arcsecond/yr.[13]

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  6. ^ a b Cite error: The named reference Halbwachs_et_al_2018 was invoked but never defined (see the help page).
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  9. ^ a b c Cite error: The named reference mnras256_3_535 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Kunitzsch was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference IAU-LSN was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Bakos_et_al_2002 was invoked but never defined (see the help page).

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angle of one arcsecond (1/3600 of a degree). The nearest star, Proxima Centauri, is about 1.3 parsecs (4.2 light-years) from the Sun: from that distance...

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the brightest star in the constellation of Centaurus is known as Alpha Centauri. For historical reasons, the Greek designations of some constellations...

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}\right\}&\left\{\Gamma _{\theta t}^{\theta },\Gamma _{\theta r}^{\theta },\Gamma _{\theta \theta }^{\theta },\Gamma _{\theta \phi }^{\theta }\right\}&\left\{\Gamma...

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Solar System (the only stars closer are the Alpha Centauri binary star system and Proxima Centauri), lies in Ophiuchus. It is located to the left of β...

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radius. In radians, it is θ 1 = 4 G M c 2 D L S D S D L , {\displaystyle \theta _{1}={\sqrt {{\frac {4GM}{c^{2}}}\;{\frac {D_{LS}}{D_{S}D_{L}}}}},} where...

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bright deep-sky objects visible in the Southern Hemisphere, such as Omega Centauri, Centaurus A, the Jewel Box, and 47 Tucanae. Moore compiled a list of 109...

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apparent magnitude are, from brightest to dimmest, Sirius, Canopus, Alpha Centauri, Arcturus, Vega, Capella, Rigel, Procyon, Achernar, and Betelgeuse In modern...

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