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HD 74156 c
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 74156</td></tr><tr> <td colspan="2">Constellation</td> <td>Hydra</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>08h 42m 25.122s[1]</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>+04° 34′ 41.15″[1]</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>7.62</td></tr><tr><td colspan="2">Distance</td><td>210 ± 7[1] ly
(64 ± 2[1] pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G1V[2]</td></tr><tr> <td>Mass</td> <td style="text-align: center">(m)</td> <td>1.24[2] M</td></tr><tr> <td>Radius</td> <td style="text-align: center">(r)</td> <td>1.64 ± 0.19[2] R</td></tr><tr> <td>Temperature</td> <td style="text-align: center">(T)</td> <td>5960 ± 100[2] K</td></tr><tr> <td>Metallicity</td> <td style="text-align: center">[Fe/H]</td> <td>0.13[2]</td></tr><tr> <td>Age</td> <td style="text-align: center"></td> <td>3.7 ± 0.4[2] Gyr</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>3.90 ± 0.02[2] AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.38 ± 0.02[2]</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>2520 ± 15[2] d</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>268 ± 4[2]°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,448,416 ± 33[2] JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>115 ± 3[2] m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>8.2 ± 0.2[2] MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>Apr 4, 2001[3]</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Naef, Mayor et al.[4]</td></tr><tr> <td colspan="2">Discovery method</td> <td>Radial velocity</td></tr><tr> <td colspan="2">Discovery site</td> <td>California</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published[4]</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 74156 c is an extrasolar planet at least eight times the mass of Jupiter orbiting the star HD 74156. It is most likely a gas giant. This planet was discovered by Dominique Naef and Michel Mayor in April 2001 together with the first planet HD 74156 b.[3][4]

References Edit

  1. 1.0 1.1 1.2 1.3 (2007). Validation of the new Hipparcos reduction. Astronomy and Astrophysics 474 (2): 653–664.Vizier catalog entry
  2. 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 (2011). The Lick-Carnegie Survey: Four New Exoplanet Candidates. The Astrophysical Journal 727 (2).
  3. 3.0 3.1 Script error
  4. 4.0 4.1 4.2 (2004). The ELODIE survey for northern extra-solar planets III. Three planetary candidates detected with ELODIE. Astronomy and Astrophysics 414 (1): 351–359.

Coordinates: Sky map 08h 42m 25.1222s, +04° 34′ 41.151″


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