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HD 27894 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 27894</td></tr><tr> <td colspan="2">Constellation</td> <td>Reticulum</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>04h 20m 47.0473s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>–59° 24′ 39.014″</td></tr><tr><td colspan="2">Distance</td><td>138.1 ly
(42.37 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>K2V</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>0.1221±0.0071 AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>0.116 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>0.128 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.049±0.08</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>17.991±0.007 d
(0.049256 y)</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>74.1 km/s</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>132.9±9.7°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,453,275.46±0.48 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>58.1±0.5 m/s</td></tr>

Physical characteristics

<tr><td>Mass</td><td style="text-align: center">(m)</td><td>>0.618±0.088 MJ
(>196 M)</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>15 Feb 2005</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Moutou, Mayor,
Bouchy et al.</td></tr><tr> <td colspan="2">Discovery method</td> <td>Radial velocity</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published</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 27894 b is a gas giant with a mass at least two thirds that of Jupiter, or twice that of Saturn. The distance from the planet to the star is one third compared that of Mercury from our Sun, and it takes almost exactly 18 days to complete one roughly circular orbit.[1]

ReferencesEdit

External links Edit

Coordinates: Sky map 04h 20m 47.0473s, −59° 24′ 39.014″


de:HD 27894 b

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