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Gliese 649 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>Gliese 649</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>16h 58m 08.850s[1]</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>25° 44′ 38.99″[1]</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>9.62</td></tr><tr><td colspan="2">Distance</td><td>33.7 ± 0.5[1] ly
(10.3 ± 0.1[1] pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>M1.5V</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>1.135 (± 0.035) AU
(169.8 Gm)</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>0.795 AU
(118.9 Gm)</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>1.475 AU
(220.7 Gm)</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.30 (± 0.08)</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>598.3 (± 4.2) d
(1.638 y)</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>20.7 km/s</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>352 (± 15)°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>12876 (± 22) JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>12.4 (± 1.1) m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>0.328 (± 0.032) MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>2009-12-17</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Johnson et al.[2]</td></tr><tr> <td colspan="2">Discovery method</td> <td>Radial velocity</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published[2]</td></tr>

Other designations
BD+25°3173 b, HIP 83043 b

<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 649 b Template:IPAc-en, or Gl 649 b is an extrasolar planet, orbiting the 10th magnitude M-type star Gliese 649, 10 parsecs from earth. This planet is a sub-Jupiter, massing 0.328 Jupiter mass and orbits at 1.135 AU.[2]

References Edit

  1. 1.0 1.1 1.2 1.3 (2007). Validation of the new Hipparcos reduction. Astronomy and Astrophysics 474 (2): 653–664.Vizier catalog entry
  2. 2.0 2.1 2.2 (2010). The California Planet Survey II. A Saturn-Mass Planet Orbiting the M Dwarf Gl649. The Publications of the Astronomical Society of the Pacific 122 (888): 149–155.


Coordinates: Sky map 16h 58m 09s, +25° 44′ 39″ Template:Star systems within 30 – 35 light-years


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