Gamma Doradus

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Star
Gamma Doradus
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation Swordfish
Right ascension 04 h 16 m 1.59 s
declination -51 ° 29 ′ 11.9 ″
Apparent brightness 4.26 (4.23-4.27) mag
Typing
B − V color index +0.30 
U − B color index +0.03 
R − I index +0.16 
Spectral class F1 V
Variable star type GDOR (prototype)  
Astrometry
Radial velocity (25.2 ± 0.5) km / s
parallax (48.89 ± 0.28)  mas
distance (66.7 ± 0.4)  ly
(20.45 ± 0.12)  pc
Visual absolute brightness M vis +2.71 mag
Proper movement 
Rec. Share: (100.79 ± 0.31)  mas / a
Dec. portion: (183.32 ± 0.37)  mas / a
Physical Properties
Dimensions 1.57  M ☉
radius 1.70  R ☉
Other names
and catalog entries
Bayer name γ Doradus
Cordoba Survey CD −51 ° 1066
Bright Star Catalog HR 1338 [1]
Henry Draper Catalog HD 27290 [2]
Gliese catalog FY 167.1 [3]
Hipparcos catalog HIP 19893 [4]
SAO catalog SAO 233457 [5]
Tycho catalog TYC 8075-1796-1 [6]Template: Infobox star / maintenance / specification of the TYC catalog
2MASS catalog 2MASS J04160159-5129119 [7]
Other names FK5  157 • GJ 9150
annotation
  1. ↑ Calculated from apparent brightness and distance.

Gamma Doradus is a main sequence star of the spectral class F1 and the third brightest star in the constellation Swordfish (Latin Dorado ). It is located at a distance of about 67 light years and has an apparent magnitude of about 4.3 magnitudes.

Gamma Doradus is a pulsation variable star . It pulsates non-radially in two coupled sinus period parts of 17.5 and 18.1 hours. Gamma Doradus is the prototype and namesake of the Gamma Doradus mutable .

Web links

Individual evidence

  1. ↑ a b c gam Dor. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed October 29, 2018 .
  2. ^ Hipparcos catalog (ESA 1997)
  3. ↑ a b gam Dor. In: VSX. AAVSO, accessed October 29, 2018 .
  4. ↑ a b c Bright Star Catalog
  5. ↑ Pulkovo radial velocities for 35493 HIP stars
  6. ^ Hipparcos, the New Reduction (van Leeuwen, 2007)