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HD 103197 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 103197</td></tr><tr> <td colspan="2">Constellation</td> <td>Centaurus</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>11h 52m 52.979s[1]</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>–50° 17′ 34.17″[1]</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>9.41</td></tr><tr><td colspan="2">Distance</td><td>170 ± 10[1] ly
(53 ± 4[1] pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>K1Vp</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>0.235 AU
(35.2 Gm)</td></tr><tr><td> </td> <td style="text-align: center"> </td> <td>4.77 mas</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0 (fixed)</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>47.8 d
(0.131 y)</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>0.1 MJ</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>Mordasini et al.[2]</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>

Other designations
HIP 57931 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>

HD 103197 b (also known as HIP 57931 b) is an extrasolar planet which orbits the K-type main sequence star HD 103197, located approximately 170 light years away[1] in the constellation Centaurus. This planet has at least one-tenth the mass of Jupiter and takes 48 days to orbit the star at a semimajor axis of 0.235 AU. Fitting the observational data with a Keplerian orbit leads to a solution with an insignificant eccentricity. This planet was announced by the Swiss-led HARPS team on October 19, 2009, together with 29 other planets.

References Edit

Coordinates: Sky map 11h 52m 52.9787s, −50° 17′ 34.160″


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