HD 37605
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Orion |
| Right ascension | 05h 40m 01.729s[1] |
| Declination | +06° 03′ 38.08″[1] |
| Apparent magnitude (V) | 8.69 |
| Astrometry | |
| Proper motion (μ) | RA: 53.15 ± 1.29[1] mas/yr Dec.: −246.44 ± 0.84[1] mas/yr |
| Parallax (π) | 22.74 ± 1.11[1] mas |
| Distance | 143 ± 7 ly (44 ± 2 pc) |
| Characteristics | |
| Spectral type | K0 V |
| Details | |
| Mass | 1 ± 0.05 M☉ |
| Radius | 0.901 ± 0.045 R☉ |
| Luminosity | 0.59 ± 0.058 L☉ |
| Surface gravity (log g) | 4.511 ± 0.024 cgs |
| Temperature | 5448 ± 44 K |
| Metallicity [Fe/H] | 0.34 dex |
| Rotational velocity (v sin i) | < 1 (57.67 days) km/s |
| Age | 7 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia | data |
HD 37605 is an orange dwarf star located approximately 143 light years away[1] in the constellation Orion. It formed about 7 billion years ago and is inactive.[2]
There are two giant planets known in orbit. Planet b was discovered in 2004[3] and planet c was discovered eight years later. The planets do not transit relative to Earth; b's maximum inclination is 88.1%.[2][4]
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. Also, observation has ruled out planets heavier than 0.7 Jupiter mass with a period of one year or less; which still allows for planets at 0.8 AU or more.[5]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥2.813 ± 0.032 MJ | 0.2837 ± 0.0016 | 55.01307 ± 0.00063 | 0.6767 ± 0.0019 | — | — |
| c | ≥3.379 ± 0.038 MJ | 3.821 ± 0.022 | 2720 ± 58 | 0.013 ± 0.015 | — | — |
See also
References
- 1 2 3 4 5 6 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.Vizier catalog entry
- 1 2 WANG Sh.; et al. (2012). "The Discovery of HD 37605c and a Dispositive Null Detection of Transits of HD 37605b". Astrophysical Journal 761: 46. arXiv:1210.6985. Bibcode:2012ApJ...761...46W. doi:10.1088/0004-637X/761/1/46.
- ↑ 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/0407146. Bibcode:2004ApJ...611L.133C. doi:10.1086/423936.
- 1 2 S. Kane (2012). "The TERMS Project: More Than Just Transit Exclusion". OASIS 44 (228.07).
- ↑ 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:0706.1962. Bibcode:2007AJ....134.1276W. doi:10.1086/520880.
External links
Coordinates: 
05h 40m 01.7296s, +06° 03′ 38.085″
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