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HD 290327 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 290327</td></tr><tr> <td colspan="2">Constellation</td> <td>Orion</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>05h 23m 21.56s[1]</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>–02° 16′ 39.4″[1]</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>8.96</td></tr><tr><td colspan="2">Distance</td><td>180 ± 20[1] ly
(57 ± 5[1] pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G5IV</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>3.35 AU
(502 Gm)</td></tr><tr><td> </td> <td style="text-align: center"> </td> <td>61.1 mas</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>2443 d
(6.69 y)</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>2.54 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>Naef 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>

Other designations
HIP 25191 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 290327 b (also known as HIP 25191 b) is an extrasolar planet which orbits the G-type subgiant star HD 290327, located approximately 180 light years away in the constellation Orion. This planet has at least five halves the mass of Jupiter and takes 6.7 years to orbit the star at a semimajor axis of 3.35 AU.[2] However unlike most other known exoplanets, its eccentricity is not known, but it is typical that its inclination is not known. This planet was detected by HARPS on October 19, 2009, together with 29 other planets.

References Edit

Coordinates: Sky map 05h 23m 21.5647s, −02° 16′ 39.428″


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