HD 33564
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| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Camelopardalis |
| Right ascension | 05h 22m 33.5319s |
| Declination | +79º 13' 52.135″ |
| Apparent magnitude (V) | 5.095 |
| Absolute magnitude (V) | 3.486 |
| Distance | 68.43 ly (20.98 pc) |
| Spectral type | F6V |
| Other designations | |
HD 33564 is a 5th magnitude star in the constellation Camelopardalis. It is a yellow-white dwarf, indicating that the star is hotter and more massive than our Sun. The age of the star is only 3 Ga; despite of this, the star is only 76% the solar abundance of iron. HD 33564 is located 20.98 parsecs or 68.43 light years away, and it is a naked eye star.
In September 2005, a planet was found orbiting the star surrounded by a disk. However, by next month, the disk was disproved because the infrared radiation is actually coming from the background galaxy passing very close to its star in apparent distance.
Contents |
[edit] HD 33564 b
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Discovery
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|
|---|---|
| Discovered by | Galland et al. |
| Discovery date | Sept 2005 |
| Detection method | Radial Velocity |
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Designations
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| Alternative names | Gliese 196 b HIP 25110 b HR 1686 b SAO 5496 b |
| Periastron | 0.737 AU |
| Apastron | 1.497 AU |
| Semi-major axis | 1.117±0.027 AU |
| Eccentricity | 0.34±0.02 |
| Orbital period | 388±3 d |
| Average orbital speed | 30.5 km/s |
| Angular distance | 53.241 mas |
| Longitude of periastron | 205±4° |
| Time of periastron | 2452603±3 JD |
| Semi-amplitude | 232±5 m/s |
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Physical characteristics
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| Mass | >9.13±0.17 MJ |
HD 33564 b is an extrasolar planet orbiting around F6V star [HD 33564]. It is an extremely massive gas giant orbiting in the parent star’s habitable zone, meaning that this giant can have water clouds like those on Earth. Due to its high mass its gravitiational pull is likely to be very high, at over 30 times that of Earth. If it has any satellites, it may provide habitable environment capable of supporting liquid water and possibly life. However, the planet is very eccentric [34%], it ranges in distance from 0.737 AU at periastron to 1.497 AU at apastron, completing repeating cycles every 388 days.
[edit] References
- F. Galland, A.-M. Lagrange, S. Udry, A. Chelli, F. Pepe, J.-L. Beuzit and M. Mayor (2005). "[http://www.aanda.org/index.php?option=article&access=standard&Itemid=129&url=/articles/aa/abs/2005/47/aahf031/aahf031.html Extrasolar planets and brown dwarfs around A-F type stars
II. A planet found with ELODIE around the F6V star HD 33564]". Astronomy & Astrophysics 444: L21–L24.
[edit] See also
[edit] External links
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