Back Mimosa Afrikaans ميموزا (نجم) Arabic Becrux AST Мімоза Byelorussian Beta Crucis Breton Beta Crucis BS Mimosa (estel) Catalan Mimosa (hvězda) Czech Becrux German Μιμόζα (αστέρας) Greek

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).
From Wikipedia, the free encyclopedia · View on Wikipedia

Developed by Nelliwinne