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HD 178911 Bb
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 178911 B</td></tr><tr> <td colspan="2">Constellation</td> <td>Lyra</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>19h 09m 04.3838s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>+34° 36′ 01.625″</td></tr><tr><td colspan="2">Distance</td><td>160 ly
(49.0 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G1V</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>0.345 AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>0.297 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>0.393 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.139 ± 0.14</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>71.511 ± 0.011 d
(0.19578 y)</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>52.7 km/s</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>172.3 ± 5°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,451,378.23 ± 83 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>346.9 ± 4.2 m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>7.35 MJ
(2340 M)</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>April 4, 2001[1]</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Zucker et al.[2]</td></tr><tr> <td colspan="2">Discovery method</td> <td>Radial velocity (Echelle)</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published[2]</td></tr>

Other designations
HIP 94076 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 178911 Bb is a planet discovered in 2001[1] by Zucker who used the radial velocity method. The minimum mass of this giant planet is 7.35 times that of Jupiter that orbits close to the star. The period of the planet is 71.5 days and the semi-amplitude is 346.9 m/s.

ReferencesEdit

  1. 1.0 1.1 Script error
  2. 2.0 2.1 (2002). A Planet Candidate in the Stellar Triple System HD 178911. The Astrophysical Journal 568 (1): 363–368.

External links Edit

Coordinates: Sky map 19h 09m 04.3838s, +34° 36′ 01.625″


de:HD 178911 B b

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