Lambda Crucis

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λ Crucis
Location of λ Crucis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Crux
Right ascension 12h 54m 39.18258s[1]
Declination −59° 08′ 48.1229″[1]
Apparent magnitude (V) 4.62[2]
Characteristics
Evolutionary stage main sequence
Spectral type B4 Vne[3]
U−B color index −0.60[4]
B−V color index −0.15[4]
Variable type β Cep?[2]
Distance
384 ± 9 ly
(118 ± 3 pc)
Absolute magnitude (MV)−1.2[6]
Details
Myr
HR 4897, SAO 240368[9]
Database references
SIMBADdata

λ Crucis,

apparent visual magnitude that fluctuates around 4.62.[2] The star is located approximately 384 light-years distant from the Sun based on parallax, and is drifting further away with a radial velocity of +12 km/s.[5] It is a proper motion
member of the Lower Centaurus–Crux sub-group in the Scorpius–Centaurus OB association, the nearest such association of co-moving massive stars to the Sun.[6]

A light curve for Lambda Crucis, plotted from Hipparcos data[11]

λ Crucis is listed in the

λ Eridani variable or rotating ellipsoidal variable.[13][14]

This object is a

luminosity of the Sun from its photosphere at an effective temperature of 16,500 K.[8]

References

  1. ^
    S2CID 18759600
    .
  2. ^
    S2CID 125853869
    . Retrieved 2019-09-16.
  3. ^
    S2CID 16492030
    .
  4. ^
    Bibcode:1966CoLPL...4...99J
    .
  5. ^
    Bibcode:1967IAUS...30...57E
    .
  6. ^
    Bibcode:1989A&A...216...44D
    .
  7. ^
    S2CID 118629873
    .
  8. ^
    doi:10.1093/mnras/stx3075
    .
  9. ^ "lam Cru". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-16.
  10. doi:10.1093/mnras/stt1690
    .
  11. ^ "Light Curve". Hipparcos ESA. ESA. Retrieved 18 August 2022.
  12. S2CID 119526948
    .
  13. ^
    doi:10.1093/mnras/277.4.1547
    .
  14. doi:10.1086/163359
    .
  15. Bibcode:1970crvs.book.....U
    .
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