HD 37605 b

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HD 37605 b
Exoplanet List of exoplanets
Parent star
Star HD 37605
Constellation Orion
Right ascension (α) 05h 40m 01.729s[1]
Declination (δ) +06° 03′ 38.08″[1]
Distance 143 ± 7[1] ly
(44 ± 2[1] pc)
Spectral type K0V
Orbital elements
Semi-major axis (a) 0.261 AU
Periastron (q) 0.0686 AU
Apastron (Q) 0.453 AU
Eccentricity (e) 0.737 ± 0.01
Orbital period (P) 54.23 ± 0.23 d
(0.1485 y)
Orbital speed (υ) 52.5 km/s
Argument of
(ω) 211.6 ± 1.7°
Time of periastron (T0) 2452994.27 ± 0.45 JD
Semi-amplitude (K) 262.9 ± 5.5 m/s
Physical characteristics
Mass (m) >2.84 MJ
(>903 M)
Discovery information
Discovery date 8 July 2004
Discoverer(s) Cochran et al.[2]
Discovery method doppler spectroscopy
Discovery site Hobby-Eberly Telescope
Discovery status Published[2]
Database references
Extrasolar Planets
Exoplanet Archive data
Open Exoplanet Catalogue data

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. ^ a b c d van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. ^ a b c Cochran, Michael; et al. (2004). "The First Hobby-Eberly Telescope Planet: A Companion to HD 37605". The Astrophysical Journal Letters. 611 (2): L133–L136. arXiv:astro-ph/0407146Freely accessible. Bibcode:2004ApJ...611L.133C. doi:10.1086/423936. 
  3. ^ Wittenmyer; Endl, Michael; Cochran, William D.; Levison, Harold F. (2007). "Dynamical and Observational Constraints on Additional Planets in Highly Eccentric Planetary Systems". The Astronomical Journal. 134 (3): 1276–1284. arXiv:0706.1962Freely accessible. Bibcode:2007AJ....134.1276W. doi:10.1086/520880. 

External links[edit]

Coordinates: Sky map 05h 40m 01.7296s, +06° 03′ 38.085″