Gamma Apodis

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Star
Gamma Apodis
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation Bird of paradise
Right ascension 16 h 33 m 27.09 s
declination -78 ° 53 ′ 49.7 ″
Apparent brightness 3.86 likes
Typing
B − V color index 0.91 
U − B color index 0.62 
Spectral class G8 III
Astrometry
Radial velocity (+5.4 ± 0.7) km / s
parallax (21.7674. ± 0.5542)  mas
distance (150 ± 4)  ly
(46 ± 1)  pc  
Visual absolute brightness M vis 0.54 mag
Proper movement 
Rec. Share: (−126.122 ± 0.688)  mas / a
Dec. portion: (−78.699 ± 0.667)  mas / a
Physical Properties
Effective temperature 5050  K
Metallicity [Fe / H] −0.05
Other names
and catalog entries
Bayer name γ Apodis
Bright Star Catalog HR 6102 [1]
Henry Draper Catalog HD 147675 [2]
Hipparcos catalog HIP 81065 [3]
SAO catalog SAO 257407 [4]
Tycho catalog TYC 9450-2282-1 [5]
annotation
  1. ↑ Calculated from apparent brightness and distance.

γ Apodis ( Gamma Apodis , short γ Aps ) is the second brightest star of the constellation Bird of Paradise in the southern sky . It appears to the naked eye as a relatively faint object with an apparent brightness of 3.86 mag. Preliminary parallax measurements by the Gaia space probe show that γ Apodis is about 150 light years from Earth. The evaluation of the data from the Hipparcos mission resulted in a slightly different value for the distance from the star, which is 156 light years. γ Apodis is a giant star of the spectral class G8, which has already left the main sequence . It is one of the 100 strongest X-ray sources within 50 parsecs of the sun and has a luminosity of 1,607 × 10 30 erg s −1 .

Remarks

  1. ↑ a b c d e Gaia data release 2 ( Gaia DR2 ), April 2018
  2. ↑ a b c d L. da Silva, et al .: Search for associations containing young stars (SACY). III. Ages and Li abundances . In: Astronomy and Astrophysics . 508, No. 2, December 2009, pp. 833-839. arxiv : 0909.0677 . bibcode : 2009A & A ... 508..833D . doi : 10.1051 / 0004-6361 / 200911736 .
  3. ↑ a b H. L. Johnson, et al .: UBVRIJKL photometry of the bright stars . In: Communications of the Lunar and Planetary Laboratory . 4, No. 99, 1966. bibcode : 1966CoLPL ... 4 ... 99J .
  4. ↑ “Gam Aps - Star” . SIMBAD Astronomical Object Database , Center de Données astronomiques de Strasbourg
  5. ↑ a b C. Abia, et al .: Abundances of light metals and NI in a sample of disc stars . In: Astronomy and Astrophysics . 206, No. 1, November 1988, pp. 100-107. bibcode : 1988A & A ... 206..100A .
  6. ^ Hipparcos, the New Reduction (van Leeuwen, 2007)
  7. ↑ Valeri V. Makarov: The 100 Brightest X-Ray Stars within 50 parsecs of the Sun . In: The Astronomical Journal . 126, No. 4, October 2003, pp. 1996-2008. bibcode : 2003AJ .... 126.1996M . doi : 10.1086 / 378164 .