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Gliese 317 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>Gliese 317</td></tr><tr> <td colspan="2">Constellation</td> <td>Pyxis</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>08h 40m 59.21s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>–23° 27′ 22.6″</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>12</td></tr><tr><td colspan="2">Distance</td><td>49.9 ly
(15.3 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>M3.5V</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>0.95 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.193 ± 0.06</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>692.9 ± 4 d
(1.9 ± 1.1 y)</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>344 ± 10°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2451639 ± 30 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>57.3 m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>1.2 MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>6 July 2007</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Johnson et al.</td></tr><tr> <td colspan="2">Discovery method</td> <td>Doppler spectroscopy</td></tr><tr> <td colspan="2">Discovery site</td> <td>Template:Country data USA W. M. Keck</td></tr><tr> <td colspan="2">Discovery status</td> <td>Confirmed</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>

Gliese 317 b is an extrasolar planet[1] approximately 50 light-years away in the constellation of Pyxis. The planet was announced in July 2007 to be orbiting the red dwarf star Gliese 317. The planet is a jovian planet that orbits about 95% the distance between Earth to the Sun. Despite of this, it takes about 1.9 years, corresponding to slow orbital velocity of 14.82 km/s.

See alsoEdit

ReferencesEdit


Coordinates: Sky map 08h 40m 59.21s, −23° 27′ 22.6″

Template:Star systems within 45 – 50 light-years


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