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HD 148427 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 148427</td></tr><tr> <td colspan="2">Constellation</td> <td>Ophiuchus</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>16h 28m 28.151s[1]</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>–13° 23′ 58.69″[1]</td></tr><tr><td colspan="2">Distance</td><td>193 ± 7[1] ly
(59 ± 2[1] pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>K0IV</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>0.93 ± 0.01 AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>0.78 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>1.08 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.16 ± 0.08</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>331.5 ± 3 d
(0.9076 ± 0.0082 y)</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>277 ± 68°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>13991 ± 15 JD</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>0.96 ± 0.1 MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>August 12, 2009</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td></td></tr><tr> <td colspan="2">Discovery method</td> <td>radial velocity</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published[2]</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 148427 b is a gas giant extrasolar planet which orbits the K-type subgiant star HD 148427, located approximately 193 light years away in the constellation Ophiuchus. This planet has a minimum mass slightly less than Jupiter and orbits slightly closer to the star than Earth to the Sun. The orbital revolution takes 331.5 days or 0.9076 years.[2] This planet was discovered on August 12, 2009 by radial velocity method.

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 (2009). Five planets and an independent confirmation of HD 196885 Ab from Lick Observatory. The Astrophysical Journal 703 (2): 1545–1556.

Coordinates: Sky map 16h 28m 28.1513s, −13° 23′ 58.704″


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