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Pollux b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>Pollux</td></tr><tr> <td colspan="2">Constellation</td> <td>Gemini</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>07h 45m 19.4s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>+28° 01′ 35″</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>1.15</td></tr><tr><td colspan="2">Distance</td><td>33.7 ly
(10.34 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>K0IIIb</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>1.64±0.27 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.02±0.03</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>589.64±0.81 d
(1.61432±0.00222 y)</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,447,739.02±4.5 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>41.0±1.6 m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>2.3±0.45 MJ</td></tr><tr><td>Stellar flux</td><td style="text-align: center">(F)</td><td>16 </td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>16 June 2006</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Hatzes et al.</td></tr><tr> <td colspan="2">Discovery method</td> <td>Radial velocity</td></tr><tr> <td colspan="2">Discovery site</td> <td>Template:Country data United States</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published</td></tr>

Other designations

<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>

Pollux b, also known as Beta Geminorum b (β Gem b / β Geminorum b) and HD 62509 b, is an extrasolar planet approximately 34 light-years away in the constellation of Gemini (the Twins). This planet was discovered orbiting the star Pollux in 2006 by astronomer Artie P. Hatzes, confirming his hypothesis originally published in 1993. The planet has a comparable mass to the gas giants in our solar system. It moves around Pollux in 1.61 years at a distance of 1.64 AU in a nearly circular orbit.

References Edit

  • A. P. Hatzes et al. (1993). Long-period radial velocity variations in three K giants. The Astrophysical Journal 413: 339–348.
  • A. P. Hatzes et al. (2006). Confirmation of the planet hypothesis for the long-period radial velocity variations of β Geminorum. Astronomy and Astrophysics 457 (1): 335–341.
  • S. Reffert et al. (2006). Precise Radial Velocities of Giant Stars. II. Pollux and Its Planetary Companion. The Astrophysical Journal 652 (1): 661–665.

External links Edit


Coordinates: Sky map 07h 45m 19.4s, +28° 01′ 35″ Template:Star systems within 30 – 35 light-years


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