Planet 55 Cnc b

Name 55 Cnc b
Discovered in 1996
Mass 0.8 (± 0.012) MJ
Semi-major axis 0.1134 (± 0.0006) AU
Orbital period 14.651 (± 0.0001) day
Eccentricity 0.0159 (± 0.008)
ω 164.0 deg
Tperi 2453035.0 (± 2.2) JD
Radius
Inclination
Update Aug. 29, 2012
Detection Method Radial Velocity
Mass Detection Method
Radius Detection method
Molecules detected
Primary transit
Secondary transit
Anomaly angle
impact Parameter b
Time Vr=0
Velocity Semiamplitude K
Calculated temperature
Measured temperature
Hottest point longitute
Surface gravity log(g/gH)
Alternate Names

Graphical Ephemeris

Remarks

  1. 24 Mar. 05: Planet e challanged; Neptune-sized planet at ~ 0.8 AU? (Wisdom, 2005)
  2. 20 apr. 03: Planet in wide (a ~ 1065 AU) binary system (Eggenberger et al 2003)
  3. 12 Feb. 03 55 Cnc is one of the 5 targets of the 14 Feb. 03 "Cosmic Call" initiative
  4. 13 Jun. 02 Periodicity at 44 d. could be due to stellar rotation, but the planet interpretation is more likely (Marcy et al 2002)
  5. 4 Dec. 01:From astrometry with HST (McGrath et al 2002), M < 30 MJ
  6. 22 Nov. 00: From astrometry (Han et al. 2000) claim a preliminary mass of 126 MJ and inclination of 179.6o
  7. 24 Jul 00: The source of RV variation remains speculative, depending on completion of one full orbit (Fischer et al 2000).
    Possible second companion; see Butler et al. 1996, Jayawardhana et al. 2000.
    The star is surrounded by a dust disk extending at least a 40 AU, with an inclination of ~ 25o. If the planets are in the same plane than the disc, this gives to the first planet a mass of 1.9+1.1 -0.4 MJ (Trilling & Brown 1998, Trilling et al 2000). But disc not confirmed by Schneider et al (2000b)
    There may by a hole with a radius of ~ 10 AU in the disk (Jayawardhana et al 2000)
  8. The star has a companion (rho Cnc B) about 1150 AU away

Other web-pages

Star

Name 55 Cnc
Distance 12.34 (± 0.4) pc
Spectral type K0IV-V
Apparent magnitude V 5.95
Mass 0.905 (± 0.015) MSun
Age 10.2 (± 2.5) Gyr
Effective temperature 5196.0 (± 24.0) K
Radius 0.943 (± 0.01) RSun
Metallicity [Fe/H] 0.31 (± 0.04)
Detected Disc
Magnetic Field
RA2000 08:52:37.0
Dec2000 +28:20:02
Alternate Names
Planetary system 5 planets

More data


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2006 ADAMS F. & LAUGHLIN G.
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2005 SCHOLL H., MARZARI F. & TRICARICO P.
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Extra-solar Planetary Systems Tend to be near a Secular Separatrix
2005 GREENBERG R. & BARNES R.
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2005 MARZARI F., SCHOLL H. & TRICARICO P.
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2005 COCHRAN W.
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2005 McARTHUR B.
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2005 MARZARI F., SCHOLL H. & TRICARICO P.
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2005 WISDOM J.
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2004 RAYMOND S. & BARNES R.
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2004 RAYMOND S. & BARNES R.
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Dynamical Habitability in the Extrasolar Planetary Systems 47 UMa and 55 Cnc.
2004 FRANCK S., BOUNAMA C., von BLOH W. & CUNTZ M.
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55 Cancri: A Planetary System on the Edge of Chaos.
2004 SCHOLL H. & MARZARI F.
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Planets in binaries.
2003 EGGENBERGER A., UDRY S. & MAYOR M.
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2003 HOLMES E. & BEICHMAN C.
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2003 JI J., KINOSHITA H., LIU L. & LI G.
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2003 KLEY W.
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2002 ZHAO G., CHEN Y., QIU H. & LI. Z.
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New Sub-millimeter Limits on Dust in the 55 Cancri Planetary System.
2002 JAYAWARDHANA R., HOLLAND W., KALAS P., GREAVES J., DENT W., WYATT M & MARCY G.
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A Planet at 5 AU Around 55 Cancri
2002 MARCY G., BUTLER P., FISCHER D., LAUGHLIN G., VOGT S., HENRY G. & POURBAIX D.
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2002 NOVAK G., LAI D. & LIN D.
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2001 FISCHER D., MARCY G., BUTLER P., VOGT S., FRINK S. & APPS K.
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Photospheric Abundances of Volatile and Refractory Elements in Planet-Harboring Stars.
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NICMOS Coronagraphic Observations of 55 Cancri.
2000 SCHNEIDER G., BECKLIN E., SMITH B., WEINBERGER A., SILVERSTONE M. & HINES D.
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1999 GREAVES J., HOLLAND JAYAWARDHANA R. & DENT W.
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Nearby stars of the Galactic disk and halo
1998 FUHRMANN K.
Astron. & Astrophys., 338, 161
paper

Imaging a Circumstellar Disk around a Star with a Radial-Velocity Planetary Companion
1998 TRILLING D. & BROWN R.
BAAS, 30, no 3, 23.03
abstract

Imaging a Circumstellar Disk around a Star with a Radial-Velocity Planetary Companion
1998 TRILLING D. & BROWN R.
BAAS
abstract

A circumstellar dust disk around a star with a known planetary companion
1998 TRILLING D. & BROWN R.
Nature, 395, 775
abstract

A Vega-like disk associated with the planetary system of {rho}1 Cnc.
1998 DOMINIK C., LAUREIJS R.J., JOURDAIN DE MUIZON M. & HABING H.J
Astron. & Astrophys., 329, L53
abstract and preprint

Planet Hunters Become Weight Watchers.
1998 SCHILLING G.
Science, 282, 395
abstract

Three new "51 Peg-type" planets
1997 BUTLER P., MARCY G., WILLIAMS E., HAUSER H. & SHIRTS P.
ApJ Letters, 474, L115
paper

Properties of sun-like stars with planets. II rho CNC, tau BOO and ups AND
1997 BALIUNAS S., HENRY, G.W., DONAHUE R.A., FEKEL F.C. & SOON W.H.
ApJ Letters, 474, L119
paper

Search for Cyclotron-maser Radio Emission from Extrasolar Planets
1997 DULK G., LEBLANC Y. & BASTIAN T.
BAAS, 29, no 3, 28.03
abstract

Three new "51 Peg-type" planets
1997 BUTLER P., MARCY G., WILLIAMS E., HAUSER H. & SHIRTS P.
ApJ Letters, 474, L115
paper

Properties of sun-like stars with planets. II rho CNC, tau BOO and ups AND
1997 BALIUNAS S. HENRY, G.W., DONAHUE R.A., FEKEL F.C. & SOON W.H.
ApJ Letters, 474, L119
paper