Upsilon Andromedae Article Index for
Upsilon
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Upsilon
 

Information About

Upsilon Andromedae






  Caption Upsilon Andromedae (circled) in Andromeda


  Epoch J20000
  Constell Andromeda
  Ra 01<sup>h</sup> 36<sup>m</sup> 478<sup>s</sup>
  Dec +41&deg 24' 20"
  Appmag V +409


  Class F8V / M45V
  B-v 054 /
  U-b 006 /
  Variable none /


  Radial V -289 /
  Prop Mo Ra -17257 /
  Prop Mo Dec -38103 /
  Parallax 7425 /
  P Error 072 /
  Dist Ly 439
  Dist Pc 135
  Absmag V 396 /


  Mass 13 /
  Radius 16 /
  Luminosity 34 /
  Temperature 6,000 /
  Metal 134% /
  Rotation ~8 km/sec /
  Age 3 &times 10<sup>9</sup> /




  Name Upsilon Andromedae Ab
  Semimajor 0059
  Eccentricity 0012 (&plusmn 015)
  Period 4617 (&plusmn 00003)
  Long Peri 73
  T Peri 2,450,002093
  Mass 069
  Discovery Date 1996
  Discovery Method Doppler Spectroscopy
  Discoverers Marcy et al


  Name Upsilon Andromedae Ac
  Semimajor 0829
  Eccentricity 028 (&plusmn 011)
  Period 2415 (&plusmn 11)
  Long Peri 250
  T Peri 2,450,1605
  Mass 189
  Discovery Date 1999
  Discovery Method Doppler Spectroscopy
  Discoverers Marcy et al


  Name Upsilon Andromedae Ad
  Semimajor 253
  Eccentricity 027 (&plusmn 011)
  Period 1284 (&plusmn 30)
  Long Peri 260
  T Peri 2,450,064
  Mass 375
  Discovery Date 1999
  Discovery Method Doppler Spectroscopy
  Discoverers Marcy et al