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Gliese 849 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>Gliese 849</td></tr><tr> <td colspan="2">Constellation</td> <td>Aquarius</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>22h 9m 40.3460s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>–4° 38′ 26.624″</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>10.42</td></tr><tr><td colspan="2">Distance</td><td>28.618 ± 0.7 ly
(8.774 ± 0.2 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>2.35 AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>2.20 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>2.50 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.06 ± 0.09</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>1890 ± 130 d
(5.17 y)</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>351 ± 60°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2411462 ± 550 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>22 ± 4 m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>0.82 MJ
(260 M)</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>August 2006</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>California and Carnegie Planet Search</td></tr><tr> <td colspan="2">Discovery method</td> <td>radial velocity</td></tr><tr> <td colspan="2">Discovery site</td> <td>W. M. Keck Observatory
Template:Country data USA</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 849 b is an extrasolar planet approximately 29 light years away in the constellation of Aquarius. It is the first long-period Jupiter-like planet discovered around a red dwarf, announced in August 2006 by the California and Carnegie Planet Search team using the radial velocity technique. The previously longest-period Jupiter-like planet around a red dwarf was Gliese 876 b. There are, however, two disproven longer period Jupiter-like planets around Lalande 21185. There are indications of a possible second companion. The planet's mass is less than that of Jupiter, though only the minimum mass is known. The distance of the planet is 2.35 AU and it takes 5.17 years (1890 days) to revolve in a circular orbit.[1]

ReferencesEdit

  1. (2006). A Long-Period Jupiter-Mass Planet Orbiting the Nearby M Dwarf GJ 849. The Astronomical Society of the Pacific 118: 1685–1689.

External linksEdit

Coordinates: Sky map 22h 09m 40.3460s, −4° 38′ 26.624″


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