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HD 34445 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 34445</td></tr><tr> <td colspan="2">Constellation</td> <td>Orion</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>05h 17m 40.98s[1]</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>+07° 21′ 12.1″[1]</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>7.31</td></tr><tr><td colspan="2">Distance</td><td>152 ± 5[1] ly
(46 ± 1[1] pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G0</td></tr><tr> <td>Mass</td> <td style="text-align: center">(m)</td> <td>1.07 M</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>2.01 ± 0.01 AU
(300 Gm)</td></tr><tr><td> </td> <td style="text-align: center"> </td> <td>43.2 mas</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>0.86 AU
(129 Gm)</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>3.16 AU
(472 Gm)</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.57 ± 0.06</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>1004 ± 7 d
(2.75 y)</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>21.9 km/s</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>135 ± 16°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>23845 ± 40 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>15.9 ± 1.2 m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>0.67 ± 0.04 MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>2004</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Howard 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>Keck Observatory</td></tr><tr> <td colspan="2">Discovery status</td> <td>Confirmed</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 34445 b is an extrasolar planet which orbits the G-type star HD 34445, located approximately 152 light years away in the constellation Orion. This planet was discovered in 2004 and finally confirmed in 2009. This planet has a minimum mass two-thirds that of Jupiter and orbits about 2 AU from the parent star. However this planet orbits in a very eccentric path. The planet’s distance from the star ranges from 0.86 to 3.16 AU however it spends its full orbit within the star's habitable zone.

See also Edit

Other planets that were discovered or confirmed on November 13, 2009:

References Edit

  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. (2010). The California Planet Survey. I. Four New Giant Exoplanets. The Astrophysical Journal 721 (2): 1467–1481.

Coordinates: Sky map 05h 17m 40.9786s, +07° 21′ 12.036″


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