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HD 109749 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 109749</td></tr><tr> <td colspan="2">Constellation</td> <td>Centaurus</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>12h 37m 16.3781s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>−40° 48′ 43.619″</td></tr><tr><td colspan="2">Distance</td><td>192 ly
(59 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G3IV</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>0.0629 AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>0.0629 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>0.0629 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>5.23947 ± 0.00056 d</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>131 km/s</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>0°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2453014.91 ± 0.5 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>28.58 ± 0.87 m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>0.28 ± 0.016 MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>August 22, 2005</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Fischer et al.[1]</td></tr><tr> <td colspan="2">Discovery method</td> <td>Doppler spectroscopy
(N2K Consortium)</td></tr><tr> <td colspan="2">Discovery site</td> <td>Keck Observatory</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published[1]</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 109749 b is an extrasolar planet that orbits extremely close to the star HD 109749, taking only 5.24 days to orbit at the distance of 0.063 AU.[1] This planet was discovered on August 22, 2005 - the same day as the discovery of Gliese 581 b.

See also Edit

References Edit

  1. 1.0 1.1 1.2 (2006). The N2K Consortium. III. Short-Period Planets Orbiting HD 149143 and HD 109749. The Astrophysical Journal 637 (2): 1094–1101.

External links Edit

Coordinates: Sky map 12h 37m 16.3781s, −40° 48′ 43.619″


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