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HD 181433 c
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 181433</td></tr><tr> <td colspan="2">Constellation</td> <td>Pavo</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>19h 25m 09.5663s[1]</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>−66° 28′ 07.671″[1]</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>8.38[1]</td></tr><tr><td colspan="2">Distance</td><td>87 ± 3[2] ly
(26.8 ± 0.8 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>K5V[3]</td></tr><tr> <td>Mass</td> <td style="text-align: center">(m)</td> <td>0.78[4] M</td></tr><tr> <td>Temperature</td> <td style="text-align: center">(T)</td> <td>4962 ± 134[4] K</td></tr><tr> <td>Metallicity</td> <td style="text-align: center">[Fe/H]</td> <td>0.33 ± 0.13[4]</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>1.76[4] AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>1.27 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>2.25 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.28 ± 0.02[4]</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>962 ± 15[4] d
(2.63 y)</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>20.0 km/s</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>21.4 ± 3.2[4]°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2453235 ± 7.3[4] JD</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>0.64[4] MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>June 16, 2008[5]</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Bouchy et al.[6]</td></tr><tr> <td colspan="2">Discovery method</td> <td>Doppler spectroscopy[5]</td></tr><tr> <td colspan="2">Discovery site</td> <td>23x15px La Silla Observatory[5]</td></tr><tr> <td colspan="2">Discovery status</td> <td>Announced[5]</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 181433 c is an extrasolar planet located approximately 87 light years away[2] in the constellation of Pavo, orbiting the star HD 181433. This planet has mass at least 0.64 times that of Jupiter and takes 962 days to orbit the star at an orbital distance of 1.76 AU or 263 Gm. However, the orbit is eccentric, which ranges from 1.27 AU (190 Gm) at periastron to 2.25 AU (337 Gm) at apastron.[4] François Bouchy et al. have published a paper detailing the HD 181433 planetary system in Astronomy and Astrophysics.[6]

References Edit

  1. 1.0 1.1 1.2 NLTT 47732 -- High proper-motion star. SIMBAD. Retrieved 2008-10-02.
  2. 2.0 2.1 van Leeuwen, F. (2007). HIP 95152. Hipparcos, the New Reduction: The Astrometric Catalogue. Retrieved 2008-10-02.
  3. ESA (1997). HIP 95152. The Hipparcos and Tycho Catalogues: The Hipparcos Main Catalogue. Retrieved 2008-10-02.
  4. 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 Schneider, J.. Notes for Planet HD 181433 c. The Extrasolar Planets Encyclopaedia. Retrieved 2008-10-02.
  5. 5.0 5.1 5.2 5.3 Script error
  6. 6.0 6.1 (2009). The HARPS search for southern extra-solar planets. XVII. Super-Earth and Neptune-mass planets in multiple planet systems HD 47186 and HD 181433. Astronomy and Astrophysics 496 (2): 527–531.

External links Edit

Coordinates: Sky map 19h 25m 09.5663s, −66° 28′ 07.671″


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