Notes for HD 190228

update: 1 September 2003

The planet(s):

• Detection method: Radial velocity
• Basic data:

  Name:	HD 190228 b
  M.sini:	4.99 MJ
  Semi-major axis:	2.31 AU
  Orbital period:	1127 ± 42 d.
  Eccentricity:	0.43 ± 0.08
  Omega (deg):	106.8 ± 6.4
  T_peri (JD-2450000):	1235 ± 61
  Inclination:	-

• Remarks:
  22 Nov. 00: From astrometry Han et al (2000) claim a preliminary mass of 45 M_J and inclination of 6.3^o
  
• References:
  1. CHEN Y. & ZHAO G., 2001
     The companion of HD 190228: planet or brown dwarf?
     Astron. & Astrophys., 374, L1
     paper
  2. HAN I., BLACK D. & GATEWOOD G., 2000
     Preliminary astrometric masses for proposed exrasolar planetary companions.
     ApJ. Letters, 548, L57
     paper
  3. LAWS Ch., GONZALEZ G., WALKER K., TYAGI S., DODSWORTH J., SNIDER K. & SUNTZEFF N., 2003
     Parent Stars of Extrasolar Planets VII: New Abundance Analyses of 30 Systems.
     Astron. J., accepted
     preprint
  4. LUHMAN K. & JAYAWARDHANA R., 2002
     An Adaptive Optics Search for Companions to Stars with Planets.
     ApJ., 566, 1132
     paper
  5. PERRIER C., SIVAN J.-P., NAEF D., BEUZIT J.-L., MAYOR M., QUELOZ D. & UDRY S., 2003
     he ELODIE survey for northern extra-solar planets I. 6 new extra-solar planet candidates.
     Astron. & Astrophys., accepted
     preprint
  6. SIVAN J.-P., MAYOR M., NAEF D., QUELOZ D., UDRY S., PERRIER-BELLET C. & BEUZIT J.-L., 2000
     A planetary companion to HD 190228.
     in Planetary Systems in the Universe: Observation, Formation and Evolution, IAU Symp. 202, Eds. A. Penny, P. Artymowicz, A.-M. Lagrange and S. Russel ASP Conf. Ser.
     paper
  7. UDRY S., MAYOR M. & QUELOZ D., 2000b
     CORALIE-ELODIE new planets and planetary systems. Looking for fossil traces of formation and evolution.
     in Planetary Systems in the Universe: Observation, Formation and Evolution, IAU Symp. 202, Eds. A. Penny, P. Artymowicz, A.-M. Lagrange and S. Russel ASP Conf. Ser.
     paper
  8. ZHAO G., CHEN Y., QIU H. & LI. Z., 2002
     Chemical Abundances of 15 Extrasolar-Planet Host Stars.
     Astron. J., 124, 2224
     paper
• Other Web pages:
  1. Geneva Observatory RV curve and data

The star:

• Distance: 66.11 pc
• Spectral type: G5IV
• Apparent magnitude: V = 7.30
• Coordinates (2000):     RA = 20 03 00.7730       DEC = +28 18 24.685
• Metallicity: [Fe/H]_sp= - 0.24
• Mass (M_sun): M= 1.30
• More data:
  • Basic Data (from simbad )
  • Most recent refs. (from ADS; enter ` HD 190228 ' in the `objects' field)