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HD 156411 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 156411</td></tr><tr> <td colspan="2">Constellation</td> <td>Ara</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>17h 19m 51.401s[1]</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>–48° 32′ 57.54″[1]</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>6.67</td></tr><tr><td colspan="2">Distance</td><td>179 ± 5[1] ly
(55 ± 1[1] pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G1Vw</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>1.81 AU
(270 Gm)</td></tr><tr><td> </td> <td style="text-align: center"> </td> <td>32.8 mas</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>842 d
(2.31 y)</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>0.75 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 84787 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 156411 b (also known as HIP 84787 b) is an extrasolar planet which orbits the G-type main sequence star HD 156411, located approximately 179 light years away in the constellation Ara. This planet has at least three-fourths the mass of Jupiter and takes eight-thirds years to orbit the star at a semimajor axis of 1.81 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 17h 19m 51.3992s, −48° 32′ 57.548″


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