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HD 181433 d
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>3.00[4] AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>1.56 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>4.44 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.48 ± 0.05[4]</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>2172 ± 158[4] d
(5.947 y)</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>15.1 km/s</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>-30 ± 13[4]°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2452154 ± 194[4] JD</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>0.54[4] MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>December 9, 2008[5]</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Bouchy et al.[5]</td></tr><tr> <td colspan="2">Discovery method</td> <td>Doppler spectroscopy</td></tr><tr> <td colspan="2">Discovery site</td> <td>23x15px La Silla Observatory</td></tr><tr> <td colspan="2">Discovery status</td> <td>Announced</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 d is an extrasolar planet located approximately 87 light years away[2] in the constellation of Pavo, orbiting the star HD 181433. This planet has a minimum mass of 0.54 Jupiter mass and takes 2172 days to orbit the star. The average orbital distance is 3.00 AU. At periastron distance, it will have distance from the star similar to Mars’ distance from the Sun at 1.56 AU. At apastron, the distance is 4.44 AU. These corresponds to the orbital eccentricity of 0.48.[4]

References Edit

  1. 1.0 1.1 1.2 NLTT 47732 -- High proper-motion star. SIMBAD. Retrieved 2008-12-15.
  2. 2.0 2.1 van Leeuwen, F. (2007). HIP 95152. Hipparcos, the New Reduction: The Astrometric Catalogue. Retrieved 2008-12-15.
  3. ESA (1997). HIP 95152. The Hipparcos and Tycho Catalogues: The Hipparcos Main Catalogue. Retrieved 2008-12-15.
  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 d. The Extrasolar Planets Encyclopaedia. Retrieved 2008-12-15.
  5. 5.0 5.1 (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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