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HD 190647 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 190647</td></tr><tr> <td colspan="2">Constellation</td> <td>Sagittarius</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>20h 07m 19.6697s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>−35° 32′ 19.079″</td></tr><tr><td colspan="2">Distance</td><td>176.8 ly
(54.2 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>2.07 ± 0.06 AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>1.70 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>2.44 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.18 ± 0.02</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>1038.1 ± 5.1 d
(2.8421 y)</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>21.8 km/s</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>232.5 ± 9.6°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,453,868 ± 25 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>36.4 ± 1.2 m/s</td></tr>

Physical characteristics

<tr><td>Mass</td><td style="text-align: center">(m)</td><td>>1.9 MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>March 5, 2007</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Naef et al.[1]</td></tr><tr> <td colspan="2">Discovery method</td> <td>HARPS</td></tr><tr> <td colspan="2">Discovery site</td> <td>Chile</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published[1]</td></tr>

Other designations
HIP 99115 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 190647 b is >1.9 MJ planet orbiting the star HD 190647 at 309.7 gigameters or 10.04 μpc away from the star, taking 89.69 megaseconds to orbit the star with average velocity of 21.8 km/s. The orbital eccentricity is 18%. Dominique Naef discovered this planet in early 2007 by using HARPS spectrograph located in Chile.[1]

See also Edit

References Edit

External links Edit

Coordinates: Sky map 20h 07m 19.6697s, −35° 32′ 19.079″


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