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HD 181433 b
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>0.080[4] AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>0.048 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>0.111 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.396[4]</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>9.3743[4] d</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>93 km/s</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>202 ± 10[4]°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2454542 ± 0.26[4] JD</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>0.0238[4] MJ
(7.56 M)</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 b 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 7.56 times that of Earth. This planet is classified as a super-Earth and orbits at 0.080 AU and varies only about 0.063 AU with an eccentricity of 0.396.[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 b. 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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