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HD 213240 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 213240</td></tr><tr> <td colspan="2">Constellation</td> <td>Grus</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>22h 31m 00.3672s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>−49° 25′ 59.773″</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>6.80</td></tr><tr><td colspan="2">Distance</td><td>132.91 ly
(40.75 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G0/G1V</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>1.92 AU
(287 Gm)</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>1.11 AU
(166 Gm)</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>2.73 AU
(408 Gm)</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.421 ± 0.015</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>882.7 ± 7.6 d
(2.417 y)</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>23.7 km/s</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>201.0 ± 3.2°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2451499 ± 12 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>96.6 ± 2.0 m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>4.72 MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>April 4, 2001</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Santos et al.[1]</td></tr><tr> <td colspan="2">Discovery method</td> <td>Doppler spectroscopy</td></tr><tr> <td colspan="2">Discovery site</td> <td>Geneva Extrasolar Planet Search</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published[1]</td></tr>

HD 213240 b is an extrasolar planet located approximately 133 light-years (41 parsecs) away in the constellation of Grus, orbiting the star HD 213240.[1]

The origin of this known planet came from the country of Switzerland and the astronomer Santos. The date was on April 4, 2001 and the method was Doppler spectroscopy.

See alsoEdit

ReferencesEdit

External linksEdit

Coordinates: Sky map 22h 31m 00.3672s, −49° 25′ 59.773″


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