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HD 100777 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 100777</td></tr><tr> <td colspan="2">Constellation</td> <td>Leo</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>11h 35m 51.5234s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>−04° 45′ 20.509″</td></tr><tr><td colspan="2">Distance</td><td>172.2 ly
(52.8 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>K0IV</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>1.03 ± 0.03 AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>0.659 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>1.40 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.36 ± 0.02</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>383.7 ± 1.2 d
(1.050 y)</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>29.3 km/s</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>202.7 ± 3.0°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,453,456.2 ± 2.3 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>34.9 ± 0.8 m/s</td></tr>

Physical characteristics

<tr><td>Mass</td><td style="text-align: center">(m)</td><td>>1.17 ± 0.02 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> <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 100777 b is an extrasolar planet located approximately 172 light-years away in the constellation of Leo, orbiting the star HD 100777. This is a >1.17 MJ planet taking 33.15 Ms to orbit at 154.1 Gm or 4.99 μpc from the star at 36% eccentricity. The velocity of the orbit is 29.3 km/s. Dominique Naef discovered this planet in March 2007 by using HARPS spectrograph located in Chile.[1]

See also Edit

References Edit

External links Edit

Coordinates: Sky map 11h 35m 51.5234s, −04° 45′ 20.509″


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