Iota Antliae

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Star
Iota Antliae
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation Air pump
Right ascension 10 h 56 m 43.05 s
declination -37 ° 08 ′ 16 ″
Apparent brightness 4.60 mag
Typing
B − V color index 1.03 
U − B color index 0.84 
R − I index 0.53 
Spectral class K0 III
Astrometry
Radial velocity (+2.30 ± 0.31) km / s
parallax (16.1823. ± 0.1882)  mas
distance (202 ± 2)  ly
(61.8 ± 0.7)  pc  
Visual absolute brightness M vis 0.65 mag
Proper movement 
Rec. Share: (+74.303 ± 0.221)  mas / a
Dec. portion: (−125.185 ± 0.259)  mas / a
Physical Properties
radius 11  R ☉
Other names
and catalog entries
Bayer name ι Antliae
Bright Star Catalog HR 4273 [1]
Henry Draper Catalog HD 94890 [2]
Hipparcos catalog HIP 53502 [3]
SAO catalog SAO 201927 [4]
annotation
  1. ↑ Calculated from apparent brightness and distance.

ι Antliae ( Iota Antliae , short ι Ant ) is the third brightest star in the constellation Air Pump with an apparent magnitude of 4.60 mag , not far from the border of the constellation Centaur . Nevertheless it appears to the naked eye only as a faint object. ι Antliae, whose distance from Earth is about 202 light years , has already left the main sequence and is today an orange giant star of the spectral class K0. Its diameter is about 11 times that of the sun ; from Earth, however, its angular diameter appears only about 0.0019 " . The process of burning helium takes place in its central region, and in the Hertzsprung-Russell diagram it belongs to the branch of the Red Clump Stars .

Individual evidence

  1. ↑ a b c d e Gaia data release 2 ( Gaia DR2 ), April 2018
  2. ↑ a b c d Hipparcos catalog (ESA 1997)
  3. ↑ a b c D. Hoffleit, WH Warren, Jr .: HR 4273 . In: The Bright Star Catalog (5th revised edition) . Center de Données astronomiques de Strasbourg .
  4. ↑ "Iot Ant - Star" . SIMBAD Astronomical Object Database , Center de Données astronomiques de Strasbourg
  5. ↑ a b HD 94890 , database entry , Catalog of Apparent Diameters and Absolute Radii of Stars (CADARS), 3rd edition, LE Pasinetti-Fracassini, L. Pastori, S. Covino and A. Pozzi, CDS ID II / 224 .
  6. ^ M. Kubiak, A. McWilliam, A. Udalski, K. Gorski: Metal Abundance of Red Clump Stars in Baade's Window . In: Acta Astronomica . 52, June 2002, pp. 159-175. bibcode : 2002AcA .... 52..159K .