HD 188015 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 188015</td></tr><tr> <td colspan="2">Constellation</td> <td>Vulpecula</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>19h 52m 04.5435s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>+28° 06′ 01.356″</td></tr><tr><td colspan="2">Distance</td><td>171.66 ly
(52.63 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G5IV</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>1.203 ± 0.070 AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>1.038 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>1.368 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.137 ± 0.026</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>461.2 ± 1.7 d
(1.263 y)</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>28.47 km/s</td></tr><tr> <td>Argument of
</td> <td style="text-align: center">(ω)</td> <td>222° ± 10°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,451,787 ± 17 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>37.6 ± 1.2 m/s</td></tr>

Physical characteristics

<tr><td>Mass</td><td style="text-align: center">(m)</td><td>>1.50 ± 0.13 MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>January 25, 2005</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Marcy et al.[1]</td></tr><tr> <td colspan="2">Discovery method</td> <td>Doppler spectroscopy</td></tr><tr> <td colspan="2">Discovery site</td> <td>Template:Country data United States</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published[1]</td></tr>

Other designations
HIP 97769 b

HD 188015 b is an extrasolar planet announced by the California and Carnegie Planet Search team in 2005.[1] Like majority of known planets, it was discovered using the radial velocity method.

The planet has a minimum mass about quarter greater than Jupiter. It orbits the star in a slightly eccentric orbit in a mean distance 20% further than Earth orbits the Sun.

Stability analysis reveals that the orbits of Earth-sized planets in the Trojan points of HD 188015 b would be stable for long periods of time.[2]


  1. 1.0 1.1 1.2 (2005). Five New Extrasolar Planets. The Astrophysical Journal 619 (1): 570–584.
  2. R. Schwarz, R. Dvorak, Á. Süli, and B. Érdi (November 2007). Survey of the stability region of hypothetical habitable Trojan planets. Astronomy & Astrophysics 474 (3): 1023–1029.: HD 93083, HD 17051, HD 28185, HD 27442, HD 188015, HD 99109, HD 221287

External linksEdit

es:HD 188015#Sistema planetario

ru:HD 188015#Планета

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