Notes for HD 195019

alias BD+18 4505, HIP 100970

by Jean Schneider

update: 22 November 2000

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The planet(s):

• Detection method: Radial velocity at Keck and Lick
• Basic data:

  Name:	HD 195019 b
  M.sini:	3.43 ± 0.4 MJ
  Semi-major axis:	~ 0.14 AU
  Orbital period:	18.3 ± 0.2 d.
  Eccentricity:	0.05 ± 0.04
  Omega (deg):	285
  T_peri (JD-2450000):	71.69
  Inclinaison:	-

• Remarks:
  22 Nov. 00: From astrometry Han et al (2000) claim a preliminary mass of 713 M_J and inclination of 0.3^o
  
• References:
  1. FISCHER D., MARCY G., BUTLER P., VOGT S. & APPS K., 1998
     Planetary companions around two solar type stars: HD 195019 and HD 217107
     PASP 111, 50
     paper
  2. GIMENEZ A., 2000
     ubvy Photometry of stars with planets.
     Astron. & Astrophys., 356, 213.
     paper
  3. HAN I., BLACK D. & GATEWOOD G., 2000
     Preliminary astrometric masses for proposed exrasolar planetary companions.
     ApJ. Letters, accepted
     paper
  4. ZUCKER S. & MAZEH T., 2000b
     Analysis of the HIPPARCOS Data of HD 195019: Another Planet Candidate Found to be a Possible Massive Secondary.
     PASP, submitted
     
• Other Web pages:
  1. RV curve (Marcy et al.)

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The star:

• Distance: ~ 20 pc
• Spectral type: G3 IV-V
• Apparent magnitude: V = 6.91
• Coordinates (2000):     RA = 20 28 17.28       DEC = +18 46 12.7
• Metallicity: [Fe/H]= 0.0
• Mass (M_sun): M= 1.02
• More data:
  • Basic Data (from simbad )
  • Most recent refs. (from ADS; enter `HD 195019' in the `objects' field)

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