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61 Virginis b
Extrasolar planet List of extrasolar planets
300px
Artist's concept of 61 Vir b
Parent star

<tr> <td colspan="2">Star</td> <td>61 Virginis</td></tr><tr> <td colspan="2">Constellation</td> <td>Virgo</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>13h 18m 24.3s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>−18° 18′ 40.3″</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>4.74</td></tr><tr><td colspan="2">Distance</td><td>27.8 ± 0.2 ly
(8.52 ± 0.05 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G5V</td></tr><tr> <td>Mass</td> <td style="text-align: center">(m)</td> <td>0.95+0.04
−0.03
 M</td></tr><tr> <td>Radius</td> <td style="text-align: center">(r)</td> <td>0.940+0.034
−0.029
 R</td></tr><tr> <td>Temperature</td> <td style="text-align: center">(T)</td> <td>5585 K</td></tr><tr> <td>Metallicity</td> <td style="text-align: center">[Fe/H]</td> <td>−0.02</td></tr><tr> <td>Age</td> <td style="text-align: center"></td> <td>6.1–6.6 Gyr</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>0.050201 ± 0.000005 AU
(7.5100 Gm)</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>0.044239 AU
(6.6181 Gm)</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>0.056163 AU
(8.4019 Gm)</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.12 ± 0.11</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>4.2150 ± 0.0006 d</td></tr><tr><td> </td> <td style="text-align: center"> </td> <td>(101.16 h)</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>130.01 km/s</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>105 ± 54°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2453369.166 JD</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>5.1 ± 0.5 M</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>2009-12-14</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Vogt et al.</td></tr><tr> <td colspan="2">Discovery method</td> <td>Radial velocity</td></tr><tr> <td colspan="2">Discovery site</td> <td>Keck Observatory
Anglo-Australian Observatory</td></tr><tr> <td colspan="2">Discovery status</td> <td>Confirmed[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>

61 Virginis b (abbreviated 61 Vir b) is an extrasolar planet, orbiting the 5th magnitude G-type star 61 Virginis, in Virgo. This planet has a minimum mass of 5.1 times that of Earth and is an example of a super-Earth planet. It orbits very close to the star, at a distance of 0.050201 AU with an eccentricity of 0.12. This planet was discovered on 14 December 2009 using the radial velocity method taken at Keck and Anglo-Australian Observatories.[2][3]

References Edit

  1. (2012). Herschel imaging of 61 Vir: implications for the prevalence of debris in low-mass planetary systems. MNRAS.
  2. Template:Cite arXiv
  3. Tim Stephens (2009-12-14). New planet discoveries suggest low-mass planets are common around nearby stars. UCSC News. UC Santa Cruz. Archived from the original on 23 December 2009. Retrieved 2009-12-14.

External links Edit

Coordinates: Sky map 13h 18m 24.3s, −18° 18′ 40.3″ Template:61 Virginis

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