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HD 13931 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 13931</td></tr><tr> <td colspan="2">Constellation</td> <td>Andromeda</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>02h 16m 47.38s[1]</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>+43° 46′ 22.8″[1]</td></tr><tr><td colspan="2">Distance</td><td>144 ± 4[1] ly
(44 ± 1[1] pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G0</td></tr><tr> <td>Mass</td> <td style="text-align: center">(m)</td> <td>1.02 ± 0.02 M</td></tr><tr> <td>Radius</td> <td style="text-align: center">(r)</td> <td>1.23 ± 0.06 R</td></tr><tr> <td>Temperature</td> <td style="text-align: center">(T)</td> <td>5829 ± 44 K</td></tr><tr> <td>Metallicity</td> <td style="text-align: center">[Fe/H]</td> <td>0.03 ± 0.04</td></tr><tr> <td>Age</td> <td style="text-align: center"></td> <td>8.4 ± 2.0 Gyr</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>5.15 ± 0.29 AU
(~770 Gm)</td></tr><tr><td> </td> <td style="text-align: center"> </td> <td>~116 mas</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>5.05 ± 0.43 AU
(~756 Gm)</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>5.25 ± 0.46 AU
(~785 Gm)</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.02 ± 0.05</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>4218 ± 388 d
(~11.55 y)</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>13.3 ± 2.2 km/s</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>290 ± 78°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>24494 ± 904 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>22.8 ± 3.0 m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>1.88 ± 0.15 MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>November 13, 2009</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Howard et al.</td></tr><tr> <td colspan="2">Discovery method</td> <td>Radial velocity</td></tr><tr> <td colspan="2">Discovery site</td> <td>Keck Observatory</td></tr><tr> <td colspan="2">Discovery status</td> <td>Submitted[2]</td></tr>

Other designations
BD+43°459 b, HIP 10626 b

<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 13931 b (also known as HIP 10626 b) is an extrasolar planet which orbits the G-type star HD 13931, located approximately 144 light years away in the constellation Andromeda. This planet takes 11.55 years to orbit the star at the average distance of 5.15 AU or 770 Gm. The planet’s eccentricity (0.02) is about the same as Earth.[2] The orbital distance for this planet ranges from 5.05 to 5.25 AU. This planet was discovered by using radial velocity method from spectrograph taken at Keck Observatory on November 13, 2009.

See also Edit

Other planets that were discovered or confirmed on November 13, 2009:

References Edit

  1. 1.0 1.1 1.2 1.3 (2007). Validation of the new Hipparcos reduction. Astronomy and Astrophysics 474 (2): 653–664. Vizier catalog entry
  2. 2.0 2.1 (2010). The California Planet Survey. I. Four New Giant Exoplanets. The Astrophysical Journal 721 (2): 1467–1481.

Coordinates: Sky map 02h 16m 47.3791s, +43° 46′ 22.784″


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