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HD 215497 b
Extrasolar planet List of extrasolar planets
300px
Artist's conception of HD 215497 b, as a hot "super-Earth".
Parent star

<tr> <td colspan="2">Star</td> <td>HD 215497</td></tr><tr> <td colspan="2">Constellation</td> <td>Tucana</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>22h 46m 36.755s[1]</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>–56° 35′ 58.32″[1]</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>8.97</td></tr><tr><td colspan="2">Distance</td><td>142 ± 7[1] ly
(44 ± 2[1] pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>K3V</td></tr><tr> <td>Mass</td> <td style="text-align: center">(m)</td> <td>0.872 ± 0.023[2] M</td></tr><tr> <td>Radius</td> <td style="text-align: center">(r)</td> <td>1.01 ± 0.11 R</td></tr><tr> <td>Temperature</td> <td style="text-align: center">(T)</td> <td>5113 ± 93[2] K</td></tr><tr> <td>Metallicity</td> <td style="text-align: center">[Fe/H]</td> <td>0.23 ± 0.07[2]</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>0.047[2] AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.16 ± 0.09[2]</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>3.93404 ± 0.00066[2] d</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>96 ± 34[2]°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,454,858.95 ± 0.37[2] JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>2.98 ± 0.34[2] m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>0.02[2] MJ
(6.6[2] M)</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>October 19, 2009</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Lo Curto et al.</td></tr><tr> <td colspan="2">Discovery method</td> <td>Radial velocity (HARPS)</td></tr><tr> <td colspan="2">Discovery site</td> <td>La Silla Observatory</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published[2]</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 215497 b is an extrasolar planet which orbits the K-type main sequence star HD 215497, located approximately 142 light years away in the constellation Tucana. This planet has at least 6.6 times the mass of Earth.[2] This planet was detected by HARPS on October 19, 2009, together with 29 other planets, including HD 215497 c.

ReferencesEdit

Coordinates: Sky map 22h 46m 36.7543s, −56° 35′ 58.322″ Template:HD 215497Template:Exoplanet-stub

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