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91 Aquarii b
Extrasolar planet List of extrasolar planets
300px
Artist's conception of planet orbiting Psi1 Aquarii, with background visual binary.
Parent star

<tr> <td colspan="2">Star</td> <td>91 Aquarii A</td></tr><tr> <td colspan="2">Constellation</td> <td>Aquarius</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>23h 15m 53.5s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>−9° 05′ 16″</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>4.21</td></tr><tr><td colspan="2">Distance</td><td>148 ly
(46 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>K0III</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>0.324Template:Dubious AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.003</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>181.84 d</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>129.57°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,454,478.1 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>97.3 m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>2.942 MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>16 November 2003</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Mitchell 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
HD 219449 b

<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>

91 Aquarii b, also known as HD 219449 b, is an extrasolar planet orbiting in the 91 Aquarii system approximately 148 light-years away in the constellation of Aquarius. It orbits at the average distance of 48.5 Gm from its star, which is closer than Mercury is to the Sun (57.9 Gm). The planet takes half a year to revolve around the star in a very circular orbit (e=0.003).

See also Edit

References Edit

External links Edit


Coordinates: Sky map 23h 15m 53.5s, −09° 05′ 16″


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