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HD 40979 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 40979</td></tr><tr> <td colspan="2">Constellation</td> <td>Auriga</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>06h 04m 29.942s[1]</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>+44° 15′ 37.59″[1]</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>6.734</td></tr><tr><td colspan="2">Distance</td><td>108 ± 2[1] ly
(33.1 ± 0.5[1] pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>F8V</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>0.855 ± 0.049 AU
(127.9 Gm)</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>0.625 AU
(93.5 Gm)</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>1.085 AU
(162.3 Gm)</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.269 ± 0.034</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>263.84 ± 0.71 d
(0.72 y)</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>35.5 km/s</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>318 ± 10°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,451,748.1
± 8.6 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>112 ± 5 m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>3.83 ± 0.36 MJ
(1217 M)</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>13 June 2002</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Fischer et al.[2]</td></tr><tr> <td colspan="2">Discovery method</td> <td>Radial velocity</td></tr><tr> <td colspan="2">Discovery site</td> <td>Lick and Keck Observatory
Fairborn Observatory
Template:Country data USA</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published[2]</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 40979 b is an extrasolar planet orbiting the star HD 40979, was detected from the Lick and Keck observatories and photometric observations at Fairborn Observatory reveal low-amplitude brightness variations in HD 40979. It is thought to be a large gas giant planet. It was discovered in 2002 by Debra Fischer.[2]

ReferencesEdit

  1. 1.0 1.1 1.2 1.3 (2007). Validation of the new Hipparcos reduction. Astronomy and Astrophysics 474 (2): 653–664.Vizier catalog entry
  2. 2.0 2.1 2.2 (2003). A Planetary Companion to HD 40979 and Additional Planets Orbiting HD 12661 and HD 38529. The Astrophysical Journal 586 (2): 1394–1408.

External links Edit

Coordinates: Sky map 06h 04m 29.9431s, +44° 15′ 37.599″


de:HD 40979 b

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