HD 81040 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 81040</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>09h 23m 47.0873s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>+20° 21′ 52.034″</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>7.72</td></tr><tr><td colspan="2">Distance</td><td>106.2 ± 4.27 ly
(32.56 ± 1.31 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G2/G3</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>1.94 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.526 ± 0.042</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>1001.7 ± 7 d</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2452504 ± 12 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>168 ± 9 m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>6.86 ± 0.71 MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>November 24, 2005</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Sozzetti 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>Observatoire de Haute-Provence
in France</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
</td><td>data</td></tr><tr><td colspan=2>SIMBAD</td><td>data</td></tr>

HD 81040 b is a massive, gas giant planet that orbits the star HD 81040. The period is just over 1000 days. It has semimajor axis of 1.94 AU. However, the orbit is extremely eccentric, little over 0.5 in value.[1]

See alsoEdit


  1. 1.0 1.1 1.2 (2006). A massive planet to the young disc star HD 81040. Astronomy and Astrophysics 449 (1): 417–424.

Coordinates: Sky map 09h 23m 47.0873s, +20° 21′ 52.034″

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