Notes for HD 217107

alias HR 8734, HIP 113421

by Jean Schneider

update: 18 September 2001

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The planet(s):

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

  Name:	HD 217107 b	HD 217107 c
  M.sini:	1.28 ± 0.4 MJ	> 4 MJ
  Semi-major axis:	0.07 AU	?
  Orbital period:	7.127 ± 0.001 d.	> 2 y
  Eccentricity:	0.14 ± 0.09	?
  Omega (deg):	25
  T_peri (JD-2450000):	1445.31
  Inclinaison:	-

• Remarks:
  1. Second planet to be confirmed.
  2. Exhibits coherent variations in residual velocities consistent with additional companion.
     24 Jul. 00: the source of RV variation remains speculative, depending on completion of one full orbit (Fischer et al 2000).
• References:
  1. FISCHER D., MARCY G., BUTLER P., VOGT S., FRINK S. & APPS K., 2000
     Planetary Companions to HD 12661, HD 92788, HD 38529 and Variations in Keplerian Residuals of Extrasolar Planets.
     ApJ, submitted
     
  2. 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
  3. GIMENEZ A., 2000
     ubvy Photometry of stars with planets.
     Astron. & Astrophys., 356, 213.
     paper
  4. RYAN S, 2000
     The Host Stars of Extrasolar Planets Have Normal Lithium Abundances.
     MNRAS, in press preprint
  5. SADAKANE K., HONDA S., KAWANOMOTO S., TAKEDA Y. & TAKADA-HIDAI M., 1999
     Metallic Abundances in the Planet-Harboring G Type Star HD 217107.
     PASJ, 51, 505
     abstract
  6. TAKEDA Y., SATO B., KAMBE E., AOKI W., HONDA S., KAWANOMOTO S., MASUDA S., IZUMIURA H., WATANABE E., KOYANO H., MAEHARA H., NORIMOTO Y., OKADA T., SHIMIZU Y., URAGUCHI F., YANAGIZAWA K. YOSHIDA M., NIYAMA S. & ANDO H., 2001
     Photospheric Abundances of Volatile and Refractory Elements in Planet-Harboring Stars.
     PASJ, 53, 1211
     paper
  7. VOGT S., MARCY G., BUTLER P. & APPS K., 1999
     Six New Planets from the Keck Precision Velocity Survey
     ApJ., 536, 902
     paper
• Other Web pages:
  1. RV curve (Marcy et al)

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The star:

• Distance: ~ 37 pc
• Spectral type: G8 IV
• Apparent magnitude: V = 6.16
• Coordinates (2000):     RA = 22 58 15.45       DEC = -02 23 42.4
• Metallicity: [Fe/H]= 0.30
• Mass (M_sun): M= 0.98
• More data:
  • Basic Data (from simbad )
  • Most recent refs. (from ADS; enter `HD 217107' in the `objects' field)

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