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HD 183263 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 183263</td></tr><tr> <td colspan="2">Constellation</td> <td>Aquila</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>19h 28m 24.5727s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>+08° 21′ 28.995″</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>7.86</td></tr><tr><td colspan="2">Distance</td><td>172 ly
(52.8 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G2IV</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>1.52 AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>0.94 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>2.10 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.38 ± 0.03</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>634.23 d
(1.7364 y)</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>26.2 km/s</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>242 ± 53°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2452120.61 ± 0.69 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>87.3 ± 3.2 m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>3.69 MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>January 25, 2005</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Marcy et al.[1]</td></tr><tr> <td colspan="2">Discovery method</td> <td>Doppler spectroscopy</td></tr><tr> <td colspan="2">Discovery site</td> <td>Keck Observatory, Hawaii,
Template:Country data USA</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published[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>

HD 183263 b is an extrasolar planet orbiting the star HD 183263. This planet has a minimum mass of 3.69 times more than Jupiter and takes 1.7364 years to orbit the star. The planet was discovered on January 25, 2005 using multiple Doppler measurements of five nearby FGK main-sequence stars and subgiants obtained during the past 4–6 years at the Keck Observatory in Mauna Kea, Hawaii. These stars, namely, HD 183263, HD 117207, HD 188015, HD 45350, and HD 99492, all exhibit coherent variations in their Doppler shifts consistent with a planet in Keplerian motion, and the results were published in a paper by Geoffrey Marcy et al. Photometric observations were acquired for four of the five host stars with an automatic telescope at Fairborn Observatory. The lack of brightness variations in phase with the radial velocities supports planetary-reflex motion as the cause of the velocity variations.[1] An additional planet in the system was discovered later.[2]

See alsoEdit

ReferencesEdit

  1. 1.0 1.1 1.2 (2005). Five New Extrasolar Planets. The Astrophysical Journal 619 (1): 570–584.
  2. (2009). Ten New and Updated Multi-planet Systems, and a Survey of Exoplanetary Systems. The Astrophysical Journal 693 (2): 1084–1099.

External linksEdit

Coordinates: Sky map 19h 28m 24.5727s, +08° 21′ 28.995″


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