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HD 240210 b
Extrasolar planet List of extrasolar planets
300px
Artistic rendering of HD 240210 b
Parent star

<tr> <td colspan="2">Star</td> <td>HD 240210</td></tr><tr> <td colspan="2">Constellation</td> <td>Cassiopeia</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>23h 10m 29.2303s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>+57° 01′ 46.035″</td></tr><tr><td colspan="2">Distance</td><td>466 ± 173 ly
(143 ± 53 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>K3III</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>1.33 AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>1.13 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>1.53 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.15 ± 0.02</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>501.75 ± 2.33 d
(1.3737 ± 0.0064 y)</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>277.49 ± 7.77°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>54486.73 ± 10.93 JD</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>6.9 MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>June 10, 2009</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Niedzielski et al.</td></tr><tr> <td colspan="2">Discovery method</td> <td>radial velocity</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 240210 b is a 6.9 Jupiter-mass exoplanet discovered on June 10, 2009 by Niedzielski et al. using the Hobby-Eberly Telescope.[1] It orbits the K3 giant star HD 240210 in the constellation of Cassiopeia. Its average orbital separation is at 1.33 Astronomical Units away from its star with a year of 501.75 days.

See also Edit

References Edit


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