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HD 11964 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 11964</td></tr><tr> <td colspan="2">Constellation</td> <td>Cetus</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>1h 57m 09.6064s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>−10° 14′ 32.739″</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>6.415</td></tr><tr><td colspan="2">Distance</td><td>107 ly
(33 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G5IV</td></tr><tr> <td>Mass</td> <td style="text-align: center">(m)</td> <td>1.125 M</td></tr><tr> <td>Radius</td> <td style="text-align: center">(r)</td> <td>2.234 ± 0.304 R</td></tr><tr> <td>Temperature</td> <td style="text-align: center">(T)</td> <td>5552 K</td></tr><tr> <td>Metallicity</td> <td style="text-align: center">[Fe/H]</td> <td>0.17</td></tr><tr> <td>Age</td> <td style="text-align: center"></td> <td>9.56 Gyr</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>3.34 ± 0.4[1] AU
(500 Gm)</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>3.14 AU
(470 Gm)</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>3.54 AU
(530 Gm)</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.06 ± 0.2[1]</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>2110 ± 70[1] d
(5.78 y)</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>17.3 km/s</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>168[1]°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,454,170 ± 380[1] JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>9.41 ± 0.39[1] m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>0.61 MJ
(194 M)</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>7 August 2005</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Butler et al.</td></tr><tr> <td colspan="2">Discovery method</td> <td>Doppler spectroscopy</td></tr><tr> <td colspan="2">Discovery site</td> <td>California, Template:Country data United States</td></tr><tr> <td colspan="2">Discovery status</td> <td>Confirmed</td></tr> <tr style="background-color: #A0B0FF;"><td align=center colspan=3>Database references</td></tr><tr valign=baseline><td colspan=2>Extrasolar Planets
Encyclopaedia
</td><td>data</td></tr><tr><td colspan=2>SIMBAD</td><td>data</td></tr>

HD 11964 b is an extrasolar planet, a gas giant like Jupiter approximately 107 light-years away in the constellation of Cetus. The planet orbits the yellow subgiant star HD 11964 in a nearly-circular orbit, taking over 5 years to complete a revolution around the star at a distance of 3.34 astronomical units.[1]

The planet was discovered in 2005 and published as part of the Catalog of Nearby Exoplanets under the designation HD 11964 b.[2] However since that time there has been confusion as to the designations of the planets in the HD 11964 system, leading to some sources designating this planet as "HD 11964 c".[3][4] In a recent review of the properties of multi-planet extrasolar planetary systems, the discovery team has stated that the correct designation for this planet is HD 11964 b.[1]

References Edit

  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 (2009). Ten New and Updated Multi-planet Systems, and a Survey of Exoplanetary Systems. The Astrophysical Journal 693 (2): 1084–1099.
  2. (2006). Catalog of Nearby Exoplanets. The Astrophysical Journal 646 (1): 505–522.
  3. Raghavan, D. et al. (2006). Two Suns in The Sky: Stellar Multiplicity in Exoplanet Systems. The Astrophysical Journal 646 (1): 523–542.
  4. Schneider, J.. Notes for planet HD 11964 c. The Extrasolar Planets Encyclopaedia. Retrieved 2008-12-15.

Coordinates: Sky map 01h 57m 09.6064s, −10° 14′ 32.739″ Template:HD 11964


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