Information About ™

Eta2 Hydri
  CATEGORIES ABOUT ETA2 HYDRI
   
hydrus constellation
   
yellow giants
   
SHOPPER'S DELIGHT
 
Shop For:  
Department
Price Minimum:
Price Maximum:
      





  Epoch J20000
  Constell Hydrus
  Ra 01<sup>h</sup> 54<sup>m</sup> 56<sup>m</sup>
  Dec -67&deg 38' 50"
  Appmag V +47


  Class G85III
  B-v
  U-b
  Variable none


  Radial V -162
  Prop Mo Ra 7600
  Prop Mo Dec 7317
  Parallax 1504
  P Error 49 40 1
  Dist Ly 21689
  Dist Pc 6653
  Absmag V


  Age 500 - 2000 Million
  Metal -021 {Link without Title} 061
  Mass 191
  Radius 1009
  Rotation 230 D
  Luminosity
  Temperature 4970


  Names HD 11977, HR 570




(η2 Hyi / η2 Hydri) is a yellow giant Star approximately 216 Light-year s away in the Constellation Hydrus . Based on its mass, it was probably a Class A star (similar to Vega or Fomalhaut ) when it was on the Main Sequence , though it is now in the Giant stage of its evolution.


ETA&SUP2; HYDRI B

  Name b
  Semimajor 193
  Eccentricity 04
  Period 711
  Period Year 19
  Mass 654
  Radius ~1097
  Temperature ~491
  Discovery Date 2005
  Discovery Method Doppler Spectroscopy
  Discoverers Hatzes et al



b (also known as '''''HD 11977 b''''') is an Extrasolar Planet orbiting . The presence of the planet around an intermediate-mass Giant Star provides indirect evidence for the existence of planetary systems around A-type stars.


REFERENCES



EXTERNAL LINKS