Iota Trianguli Australis

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Iota Trianguli Australis

A light curve for Iota Trianguli Australis, plotted from Hipparcos data[1]
Observation data
ICRS
)
Constellation Triangulum Australe
Right ascension 16h 27m 57.34498s[2]
Declination −64° 03′ 28.5964″[2]
Apparent magnitude (V) +5.27[3]
Characteristics
Spectral type F4 IV[4]
U−B color index −0.02[3]
B−V color index +0.36[3]
Variable type γ Dor[5]
Distance
127 ± 3 ly
(38.8 ± 0.8 pc)
Absolute magnitude (MV)+2.34[7]
Semi-amplitude
(K1)
(primary)		38.4±0.3 km/s
Semi-amplitude (K2)
(secondary)		43.9±0.3 km/s
Details
ι TrA A
Rotational velocity (v sin i)
10.0±1.7[7] km/s
HR 6109, SAO 253555, CCDM 16280-6403, WDS J16280-6403A[10]
Database references
SIMBADdata

Iota Trianguli Australis (ι Trianguli Australis) is a

light years from the Sun. The system appears to be moving closer to the Sun with a radial velocity of around −6 km/s.[6]

Iota Trianguli Australis is a double-lined

subgiant star and a Gamma Doradus type variable, pulsating by 0.12 magnitudes with a dominant period of 1.45 days.[5]

There a magnitude 9.42

arcseconds away.[12] The pair show as a yellow and a white star when seen though a 7.5 cm telescope.[13]

References

  1. ^ "Light Curve", Hipparcos ESA, ESA, retrieved 22 August 2022.
  2. ^
    S2CID 18759600
    .
  3. ^
    Bibcode:1978A&AS...34....1N
    .
  4. doi:10.1086/111786
    .
  5. ^
    doi:10.1063/1.3246549
    .
  6. ^
    S2CID 59451347
    , A61.
  7. ^
    S2CID 53666672
    .
  8. ^
    S2CID 33401607
    .
  9. S2CID 56118016
    .
  10. ^ "iot TrA". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-09-17.{{cite web}}: CS1 maint: postscript (link)
  11. S2CID 14878976
    .
  12. doi:10.1086/323920
    .
  13. ISBN 0521318874
    .
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