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Mu Arae d
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>Mu Arae</td></tr><tr> <td colspan="2">Constellation</td> <td>Ara</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>17h 44m 08.7s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>−51° 50′ 03″</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>5.15</td></tr><tr><td colspan="2">Distance</td><td>50.6 ± 0.2 ly
(15.51 ± 0.07 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G3IV–V</td></tr><tr> <td>Mass</td> <td style="text-align: center">(m)</td> <td>1.10 ± 0.01 M</td></tr><tr> <td>Radius</td> <td style="text-align: center">(r)</td> <td>1.36 ± 0.01 R</td></tr><tr> <td>Temperature</td> <td style="text-align: center">(T)</td> <td>5820 ± 40 K</td></tr><tr> <td>Metallicity</td> <td style="text-align: center">[Fe/H]</td> <td>0.30 ± 0.01</td></tr><tr> <td>Age</td> <td style="text-align: center"></td> <td>6.34 ± 0.40 Gyr</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>0.9210[1] AU
(137.78 Gm)</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>0.8597 AU
(128.61 Gm)</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>0.9823 AU
(146.96 Gm)</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.0666 ± 0.0122[1]</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>310.55 ± 0.83[1] d
(0.8502 y)</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>189.6 ± 9.4[1]°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2452708.7 ± 8.3[1] JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>14.91 ± 0.59[1] m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>0.5219[1] MJ
(165.9[1] M)</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>August 5, 2006</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Goździewski et al.
Mayor, Pepe</td></tr><tr> <td colspan="2">Discovery method</td> <td>Doppler Spectroscopy</td></tr><tr> <td colspan="2">Discovery site</td> <td>23x15px Chile, South America</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published</td></tr>

Other designations
HD 160691 d

<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>

Mu Arae d (also known as HD 160691 d) is an extrasolar planet orbiting the star Mu Arae. The planet has a mass about half that of Jupiter and orbits at a distance of 0.921 AU from the star with a period of 310.55 days. The planet may be located at a distance close enough to the star to receive a comparable amount of ultraviolet radiation as the Earth does from the Sun, however it is too close to the star to be able to support liquid water at its surface.[2] Furthermore, given its mass, the planet is likely to be a gas giant with no solid surface.

References Edit

  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Pepe, F.; Correia, A. C. M.; Mayor, M.; Tamuz, O.; Couetdic, J.; Benz, W.; Bertaux, J.-L.; Bouchy, F.; Laskar, J.; Lovis, C.; Naef, D.; Queloz, D.; Santos, N. C.; Sivan, J.-P.; Sosnowska, D.; Udry, S. (2007). The HARPS search for southern extra-solar planets. VIII. μ Arae, a system with four planets. Astronomy and Astrophysics 462 (2): 769–776.
  2. Buccino, A. (2006). Ultraviolet Radiation Constraints around the Circumstellar Habitable Zones. Icarus 183 (2): 491–503.

Template:Mu Arae Coordinates: Sky map 17h 44m 08.7s, −51° 50′ 03″ Template:Nearest bright star systems


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