S Crucis

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S Crucis
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Crux
Right ascension 12h 54m 21.99728s[1]
Declination −58° 25′ 50.2146″[1]
Apparent magnitude (V) 6.22 - 6.92[2]
Characteristics
Spectral type F6-G1Ib-II[2]
Variable type δ Cep[2]
Distance
3,200 ± 100 ly
(980 ± 40 pc)
Absolute magnitude (MV)-3.27[5]
Details
Myr
HR 4895, SAO 240362[8]
Database references
SIMBADdata
classical Cepheid variable S Crucis recorded by NASA's Transiting Exoplanet Survey Satellite
(TESS)

S Crucis is a star in the constellation Crux. A Cepheid variable, its apparent magnitude ranges from 6.22 to 6.92 over 4.68997 d.[2] It is a yellow-white supergiant that pulsates between spectral types F6Ib-II and G1Ib-II.[2]

S Crucis is a

δ Cephei type, a Classical Cepheid variable. Its mean radius is 37.9 R☉ and that radius varies by up to 4.1 R☉ during its 4.7-day pulsation cycle.[6] Over the same cycle, the effective temperature varies between 5,517 K and 6,482 K.[4] The star is thought to be 116 million years old; it has exhausted its core hydrogen and left the main sequence.[7]

References

  1. ^
    doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  2. ^ a b c d e Watson, Christopher (4 January 2010). "S Crucis". AAVSO Website. American Association of Variable Star Observers. Retrieved 12 March 2014.
  3. S2CID 119231169
    .
  4. ^
    S2CID 119078747
    .
  5. doi:10.1111/j.1365-2966.2010.18183.x
    .
  6. ^
    Bibcode:2005AcA....55..247M
    .
  7. ^
    S2CID 119788977
    .
  8. ^ "V* S Cru". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 12 March 2014.
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