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Mimosa (star)

Mimosa
Location of Mimosa (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Crux
Pronunciation /mɪˈmoʊsə/[1]
Right ascension 12h 47m 43.26877s[2]
Declination −59° 41′ 19.5792″[2]
Apparent magnitude (V) 1.25[3] (1.23 - 1.31)[4]
Characteristics
Spectral type B0.5 III[5] / B2V[6]
U−B color index −0.98[3]
B−V color index −0.23[3]
Variable type β Cep[5]
Astrometry
Radial velocity (Rv)+15.6[7] km/s
Proper motion (μ) RA: −42.97[2] mas/yr
Dec.: −16.18[2] mas/yr
Parallax (π)11.71 ± 0.98 mas[2]
Distance280 ± 20 ly
(85 ± 7 pc)
Absolute magnitude (MV)−3.92[8]
Orbit[6]
Primaryβ Crucis A
Companionβ Crucis B
Period (P)1828.0±2.5 days
Semi-major axis (a)8.7 AU
Eccentricity (e)0.38±0.09
Periastron epoch (T)2,449,879±38 HJD
Argument of periastron (ω)
(secondary)		293±9°
Details
A
Mass14.5±0.5[9] M☉
Radius7.3–8.9[9] R☉
Luminosity25,700+4,500
−3,830[10] L☉
Surface gravity (log g)3.6±0.1[5] cgs
Temperature28,840[10] K
Metallicity [Fe/H]−0.08[11] dex
Rotation3.6 days[5]
Rotational velocity (v sin i)35[5] km/s
Age11.3±1.6[9] Myr
B
Mass10[6] M☉
Surface gravity (log g)4.0[6] cgs
Temperature23,000[6] K
Other designations
Mimosa[1] Becrux,[12], β Crucis, CPD−59°4451, FK5 481, HD 111123, HIP 62434, HR 4853, SAO 240259[13]
Database references
SIMBADdata

Mimosa is the second-brightest object in the southern constellation of Crux (after Acrux), and the 20th-brightest star in the night sky. It has the Bayer designation β Crucis, which is Latinised to Beta Crucis and abbreviated Beta Cru or β Cru. Mimosa forms part of the prominent asterism called the Southern Cross. It is a binary star or a possible triple star system.

  1. ^ a b Cite error: The named reference IAU-CSN was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference aaa474_2_653 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference clpl4_99 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference gcvs was invoked but never defined (see the help page).
  5. ^ a b c d e Cite error: The named reference mnras386_4_1855 was invoked but never defined (see the help page).
  6. ^ a b c d e Cite error: The named reference aaa329_137 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference rgcrv was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference kaltcheva2014 was invoked but never defined (see the help page).
  9. ^ a b c Cite error: The named reference Cotton2021 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Sharma2022 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference aaa282_3_867 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference bs was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).

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Mimosa AF ميموزا (نجم) Arabic Becrux AST Мімоза BE Beta Crucis BR Beta Crucis BS Mimosa (estel) Catalan Mimosa (hvězda) Czech Becrux German Μιμόζα (αστέρας) Greek

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