HD 37605 b
Extrasolar planet List of extrasolar planets
Artist's conception of HD 37605 b, as a hot jupiter.
Parent star

<tr> <td colspan="2">Star</td> <td>HD 37605</td></tr><tr> <td colspan="2">Constellation</td> <td>Orion</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>05h 40m 01.729s[1]</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>+06° 03′ 38.08″[1]</td></tr><tr><td colspan="2">Distance</td><td>143 ± 7[1] ly
(44 ± 2[1] pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>K0V</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>0.261 AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>0.0686 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>0.453 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.737 ± 0.01</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>54.23 ± 0.23 d
(0.1485 y)</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>52.5 km/s</td></tr><tr> <td>Argument of
</td> <td style="text-align: center">(ω)</td> <td>211.6 ± 1.7°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2452994.27 ± 0.45 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>262.9 ± 5.5 m/s</td></tr>

Physical characteristics

<tr><td>Mass</td><td style="text-align: center">(m)</td><td>>2.84 MJ
(>903 M)</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>8 July 2004</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Cochran et al.[2]</td></tr><tr> <td colspan="2">Discovery method</td> <td>doppler spectroscopy</td></tr><tr> <td colspan="2">Discovery site</td> <td>Hobby-Eberly Telescope</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published[2]</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 37605 b is an extrasolar planet that has nearly three times more mass than Jupiter. It orbits close to the star, taking 54 days to revolve around the parent star HD 37605. Its orbit is highly eccentric, around 74%. Distance from HD 37605 ranges from 0.069 to 0.453 astronomical units.

It is the first planet found by Hobby-Eberly Telescope (HET) in July 2004.[2]

In a simulation, HD 37605 b's orbit "sweeps clean" most test particles within 0.5 AU; leaving only asteroids "in low-eccentricity orbits near the known planet’s apastron distance, near the 1:2 mean-motion resonance" with oscillating eccentricity up to 0.06, and also at 1:3 with oscillating eccentricity up to 0.4.[3]


  1. 1.0 1.1 1.2 1.3 (2007). Validation of the new Hipparcos reduction. Astronomy and Astrophysics 474 (2): 653–664.Vizier catalog entry
  2. 2.0 2.1 2.2 (2004). The First Hobby-Eberly Telescope Planet: A Companion to HD 37605. The Astrophysical Journal Letters 611 (2): L133–L136.
  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 05h 40m 01.7296s, +06° 03′ 38.085″

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