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HD 147018 b
Extrasolar planet List of extrasolar planets
300px
Artist's conception of HD 147018 b, as a hot jovian planet.
Parent star

<tr> <td colspan="2">Star</td> <td>HD 147018</td></tr><tr> <td colspan="2">Constellation</td> <td>Triangulum Australe</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>16h 23m 00.1463s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>−61° 41′ 19.542″</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>8.4</td></tr><tr><td colspan="2">Distance</td><td>140.12 ± 5.2 ly
(42.96 ± 1.6 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G9V</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>0.2388 ± 0.0039 AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>0.1269 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>0.3507 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.4686 ± 0.0081</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>44.236 ± 0.008 d
(0.12111 ± 2e-5 y)</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>-24.03 ± 1.23°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>4459.49 ± 0.1 JD</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>2.12 ± 0.07 MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>August 11, 2009</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Segransan et al.</td></tr><tr> <td colspan="2">Discovery method</td> <td>radial velocity (CORALIE)</td></tr><tr> <td colspan="2">Discovery site</td> <td>La Silla Observatory</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published</td></tr>

Other designations
HIP 80250 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 147018 b is a gas giant extrasolar planet which orbits the G-type main sequence star HD 147018, located approximately 140 light years away in the constellation Triangulum Australe. This planet has minimum mass more than twice that of Jupiter but this planet orbits a lot closer to the star than Jupiter to the Sun by a factor of 22. Meanwhile, it has an eccentric orbit. The planet can get as close to the star as 0.13 AU or can get as far as 0.35 AU. Further out, there is another superjovian planet HD 147018 c, which was discovered on the same date as this planet, on August 11, 2009.

References Edit

Coordinates: Sky map 16h 23m 00.1463s, −61° 41′ 19.542″


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