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HD 168746 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 168746</td></tr><tr> <td colspan="2">Constellation</td> <td>Serpens</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>18h 21m 49.7832s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>–11° 55′ 21.660″</td></tr><tr><td colspan="2">Distance</td><td>140.6 ly
(43.12 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G5V</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>0.065 AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>0.060 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>0.070 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.081 ± 0.029</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>6.403 ± 0.001 d
(0.01753 y)</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>110 km/s</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>16.30 ± 20.88°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,451,994.7 ± 0.4 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>28.6 ± 1.7 m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>0.23 MJ
(73 M)</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>April 15, 2000[1]</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Pepe, Mayor,
Galland et al.</td></tr><tr> <td colspan="2">Discovery method</td> <td>Doppler spectroscopy
(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> <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 168746 b is an extrasolar planet orbiting the star HD 168746.[1] It has a minimum mass about one fourth that of Jupiter, so it is most likely a gas giant. It orbits very near the star in a so-called "torch orbit" completing one revolution in only about six and half days.

See also Edit

ReferencesEdit

  1. 1.0 1.1 Script error

External links Edit

Coordinates: Sky map 18h 21m 49.7832s, −11° 55′ 21.660″


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