HD 33636
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| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Orion |
| Right ascension | 05h 11m 46.4490s |
| Declination | +04º 24' 12.7418″ |
| Apparent magnitude (V) | 7.06 |
| Absolute magnitude (V) | 4.77 |
| Distance | 93.6 ly (28.7 pc) |
| Spectral type | G0VH-03 |
| Other designations | |
HD 33636 is a 7th magnitude yellow main-sequence star located in Orion constellation. It is located at a distance of 93.6 light years from our home planet.
The companion object was an exoplanet discovered in 2003 but it was turned to a stellar status in 2007.
[edit] HD 33636 b
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor axis | (a) | 3.27 AU |
| Eccentricity | (e) | 0.4805 ± 0.006 |
| Orbital period | (P) | 2117.3 ± 0.8 d |
| Inclination | (i) | 4.1 ± 0.1° |
| Angular distance | (θ) | 14.2 ± 0.2 mas |
| Longitude of periastron |
(ω) | 339.5 ± 1.4° |
| Time of periastron | (T0) | 2451205.8 ± 6.4 JD |
| Semi-amplitude | (K) | 11420 ± 600 m/s |
| Physical characteristics | ||
| Mass | (m) | 142 ± 11 MJ |
| Discovery information | ||
| Discovery date | 2003 | |
| Discoverer(s) | Perrier et al. | |
| Detection method | Radial Velocity | |
| Discovery site | France | |
| Discovery status | Retracted | |
HD 33636 b was an exoplanet with a minimum mass of 9.28 Jupiter mass which was discovered in 2003 by Perrier et al. who used ELODIE spectrometer in France.
In 2007, Bean et al. used the Hubble Space Telescope (HST) and he found that this planet has an inclination as little as 4.1 ± 0.1º, which yielded the true mass of 142 Jupiter mass, too high to be a planet. Instead it is classified as an M-dwarf star of spectral type M6V.
This star takes 2117 days or 5.797 years to orbit at the average distance of 3.27 Astronomical Units (AU).
[edit] References
- Vogt et al. (2002). "Ten Low-Mass Companions from the Keck Precision Velocity Survey". The Astrophysical Journal 568 (1): 352 – 362. doi:.
- Butler et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646 (1): 505 – 522. doi:. (web Preprint)
- Perrier et al. (2003). "The ELODIE survey for northern extra-solar planets. I. Six new extra-solar planet candidates". Astronomy and Astrophysics 410: 1039–1049. doi:.
- Bean et al. (2007). "The Mass of the Candidate Exoplanet Companion to HD 33636 from Hubble Space Telescope Astrometry and High-Precision Radial Velocities". The Astronomical Journal 134 (2): 749–758. doi:.
[edit] External links
- HD 33636 -- Yellow Main Sequence Star. Extrasolar Visions. Retrieved on December 21, 2007.
- HD 33636 -- Ammonia Cloud Jovian, Eccentric. Extrasolar Visions. Retrieved on December 21, 2007.
- G 97-25 -- High Proper Motion Star. SIMBAD. Retrieved on December 21, 2007.
- HD 33636b -- Star. SIMBAD. Retrieved on December 21, 2007.
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