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HD 142022 Ab
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 142022 A</td></tr><tr> <td colspan="2">Constellation</td> <td>Octans</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>16h 10m 15.0238s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>−84° 13′ 53.802″</td></tr><tr><td colspan="2">Distance</td><td>117 ly
(35.9 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G9V</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>2.93 AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>1.38 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>4.48 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.53 ± 0.20</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>1928 ± 46 d
(5.278 y)</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>16.6 km/s</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>170 ± 9°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,450,971 ± 75 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>92 ± 65 m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>4.47 MJ
(1420 M)</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>14 February 2005</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Eggenberger et al.</td></tr><tr> <td colspan="2">Discovery method</td> <td>Radial Velocity
(CORALIE)</td></tr><tr> <td colspan="2">Discovery site</td> <td>La Silla Observatory</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published</td></tr>

Other designations
HIP 79242 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 142022 Ab is an exoplanet discovered by the radial velocity method by Eggenberger et al. in 2005 after finding that HD 142022 A is wobbling which indicated the presence of a massive planet, designating as HD 142022 Ab, with mass of 4.5 times Jupiter. It has a relatively wide separation between a planet and a star with nearly 3 AU, which takes 1928 days or 5.28 years to revolve. As it is typical for long-period planets, it has a relatively high eccentricity of 53±20%.

See also Edit

ReferencesEdit

External links Edit

Coordinates: Sky map 16h 10m 15.0238s, −84° 13′ 53.802″


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