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HD 164922 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 164922</td></tr><tr> <td colspan="2">Constellation</td> <td>Hercules</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>18h 02m 30.86s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>+26° 18′ 46.81″</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>7.01</td></tr><tr><td colspan="2">Distance</td><td>71.5 ly
(21.93 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>K0V</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>2.11 ± 0.13 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.05 ± 0.14</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>1155 ± 23 d</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>195°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,411,100 ± 280 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>7.3 ± 1.2 m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>0.36 ± 0.046 MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>July 15, 2006</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Butler et al.[1]</td></tr><tr> <td colspan="2">Discovery method</td> <td>Radial velocity</td></tr><tr> <td colspan="2">Discovery site</td> <td>California, USA</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published[1]</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 164922 b is an extrasolar planet orbiting around orange dwarf star HD 164922, located in Hercules constellation at a distance of 71.5 light years from Earth. Its inclination is not known, and its true mass may be significantly greater than the radial velocity lower limit of 0.36 Jupiter masses. The planet also has a low eccentricity, unlike most other long period extrasolar planets – 0.05 – about the same as Jupiter and Saturn in our own solar system.[1]

ReferencesEdit

  1. 1.0 1.1 1.2 (2006). Catalog of Nearby Exoplanets. The Astrophysical Journal 646 (1): 505–522.

See alsoEdit

Coordinates: Sky map 18h 02m 30.86s, +26° 18′ 46.81″


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