HD 33283
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| Observation data Epoch J2000.0 |
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|---|---|
| Constellation (pronunciation) |
Lepus |
| Right ascension | 05h 08m 01.0118s |
| Declination | -26º 47' 50.896″ |
| Apparent magnitude (V) | 8.05 |
| Absolute magnitude (V) | 3.36 |
| Distance | 283.37 ly (86.88 pc) |
| Spectral type | G4V |
| Other designations | |
HD 33283 is an 8th magnitude star in the constellation Lepus. It is located 86.88 parsecs (283.37 light years) away from the solar system. HD 33283 is similar to our Sun in terms of spectral type [G4V]. However, the star dwarfs the Sun by 24% more massive, 20% larger, 210 K hotter, and 232% more metals. The star is younger than our Sun by 40%.
In 2006, Johnson found his jovian planet orbiting HD 33283.
Contents |
[edit] HD 33283 b
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Discovery
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|---|---|
| Discovered by | Johnson et al. |
| Discovery date | April 2006 |
| Detection method | Doppler Spectroscopy |
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Designations
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| Alternative names | HIP 23889 b SAO 170100 b |
| Periastron | 0.075 AU |
| Apastron | 0.215 AU |
| Semi-major axis | 0.145±0.006 AU |
| Eccentricity | 0.48±0.05 |
| Orbital period | 18.179±0.007 d |
| Average orbital speed | 86.5 km/s |
| Angular distance | 1.669 mas |
| Longitude of periastron | 155.8±8.0° |
| Time of periastron | 2453017.6±0.3 JD |
| Semi-amplitude | 25.2±2.0 m/s |
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Physical characteristics
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| Mass | >0.33 MJ |
HD 33283 b is a planet around HD 33283. The mass of the planet is about 1/3 that of Jupiter or about the same as Saturn. However, the planet orbits very close to the star, taking only 18 days to complete its orbit with average velocity of 86.5 km/s. Despite of this, its orbit is chaotic, bringing as close as 0.075 AU to as far away as 0.215 AU.
[edit] References
- Johnson, John Asher; Marcy, Geoffrey W.; Fischer, Debra A.; Laughlin, Gregory; Butler, R. Paul; Henry, Gregory W.; Valenti, Jeff A.; Ford, Eric B.; Vogt, Steven S.; Wright, Jason T. (2006). "The N2K Consortium. VI. Doppler Shifts without Templates and Three New Short-Period Planets". The American Astronomical Society 647 (1): 600–611. doi:.
[edit] See also
[edit] External links
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