HD 89744 b[1]
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 89744</td></tr><tr> <td colspan="2">Constellation</td> <td>Ursa Major</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>10h 11m 10.5621s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>+41° 13′ 46.308″</td></tr><tr><td colspan="2">Distance</td><td>130 ly
(40 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>F7V</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>0.934 ± 0.054 AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>0.302 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>1.566 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.6770 ± 0.0072</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>256.80 ± 0.13 d
(0.70307 y)</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>39.7 km/s</td></tr><tr> <td>Argument of
</td> <td style="text-align: center">(ω)</td> <td>194.4 ± 1.2°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,451,505.33 ± 0.39 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>267.3 ± 5.0 m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>8.58 ± 0.71 MJ
(2730 M)</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>April 22, 2000</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Korzennik et al.</td></tr><tr> <td colspan="2">Discovery method</td> <td>Doppler Spectroscopy
(Echelle)</td></tr><tr> <td colspan="2">Discovery site</td> <td>Whipple Observatory</td></tr><tr> <td colspan="2">Discovery status</td> <td>Confirmed</td></tr> <tr style="background-color: #A0B0FF;"><td align=center colspan=3>Database references</td></tr><tr valign=baseline><td colspan=2>Extrasolar Planets
</td><td>data</td></tr><tr><td colspan=2>SIMBAD</td><td>data</td></tr>

HD 89744 b is an eccentric Jupiter extrasolar planet orbiting the star HD 89744.[2]

In a simulation of a 10 million year span, this planet swept away all test particles "except for a narrow region near the 8:3 resonance". There can be no planets in this star's habitable zone. Observation has ruled out any planet over 0.7 Jupiter mass within a year period.[3]


  1. (2006). Catalog of Nearby Exoplanets. The Astrophysical Journal 646 (1): 505–522.
  2. (2000). A High-Eccentricity Low-Mass Companion to HD 89744. The Astrophysical Journal Letters 533 (2): L147–L150.
  3. Wittenmyer et al. (2007). Dynamical and Observational Constraints on Additional Planets in Highly Eccentric Planetary Systems. The Astronomical Journal 134 (3): 1276–1284.

External links Edit

Coordinates: Sky map 10h 11m 10.5621s, +41° 13′ 46.308″

es:HD 89744#Sistema planetario

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