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Gliese 674 b
Extrasolar planet List of extrasolar planets
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Radial velocity of GJ 674 over time, caused by the orbit of GJ 674 b.
Parent star

<tr> <td colspan="2">Star</td> <td>Gliese 674</td></tr><tr> <td colspan="2">Constellation</td> <td>Ara</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>17h 28m 39.9463s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>–46° 53′ 42.685″</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>9.38</td></tr><tr><td colspan="2">Distance</td><td>14.8 ± 0.1 ly
(4.54 ± 0.03 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>M3V</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>0.039 AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>0.031 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>0.047 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.2 ± 0.02</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>4.6938 ± 0.007 d
(0.012851 y)</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>6 ± 200°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2453780.085 ± 0.078 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>8.70 ± 0.19 m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>0.037 MJ
(11.8 M)</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>January 7, 2007</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Bonfils et al.</td></tr><tr> <td colspan="2">Discovery method</td> <td>HARPS</td></tr><tr> <td colspan="2">Discovery site</td> <td>ESO</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>

Gliese 674 b is an extrasolar planet approximately 15 light years away in the constellation of Ara. This planet orbits tightly around Gliese 674. It is a sub-Neptune-or-Uranus-mass planet either gaseous or rocky. It orbits as close as 0.039 AU from the star and takes only 4.6938 days to orbit. This planet has a similar eccentricity to Mercury (e=0.2). The discovery of the planet was announced on January 7, 2007 by using the HARPS spectrograph mounted on the ESO’s 3.6 meter telescope at La Silla, Chile.

ReferencesEdit

External links Edit

Coordinates: Sky map 17h 28m 39.9463s, −46° 53′ 42.685″

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