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HD 192699 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 192699</td></tr><tr> <td colspan="2">Constellation</td> <td>Aquila</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>20h 16m 06.005s[1]</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>+04° 34′ 50.85″[1]</td></tr><tr><td colspan="2">Distance</td><td>214 ± 8[1] ly
(66 ± 2[1] pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G8IV</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>1.16 AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>1.15 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>1.33 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.149 ± 0.06</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>351.5 ± 6 d
(0.9624 y)</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>36.0 km/s</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>54 ± 30°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2452994 ± 30 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>48.1 ± 5 m/s</td></tr>

Physical characteristics

<tr><td>Mass</td><td style="text-align: center">(m)</td><td>>2.5 MJ
(>790 M)</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>April 10, 2007</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Johnson et al.</td></tr><tr> <td colspan="2">Discovery method</td> <td>Doppler Spectroscopy</td></tr><tr> <td colspan="2">Discovery site</td> <td>Lick and Keck Observatory
Template:Country data USA</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published</td></tr>

Other designations
HIP 99894 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 192699 b is an exoplanet located approximately 214 light-years away in the constellation of Aquila, orbiting the star HD 192699. This planet was discovered in April 2007, massing at least 2.5 times the mass of Jupiter (MJ). Despite of its orbital distance more than Earth, the orbital period is less than a year, that's because the parent star is more massive than the Sun.[2]

The existence of this planet around a 1.68 solar mass (M) star provides evidence for the existence of planetary systems around A-type main sequence stars.

See also Edit

ReferencesEdit

  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. (2007). Retired A Stars and Their Companions: Exoplanets Orbiting Three Intermediate-Mass Subgiants. The Astrophysical Journal 665 (1): 785–793.

External links Edit

Coordinates: Sky map 20h 16m 06.0043s, +04° 34′ 50.863″


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