HD 49674
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| Observation data Epoch 2000 |
|
|---|---|
| Constellation (pronunciation) |
Auriga |
| Right ascension | 6h 51m 30.52s |
| Declination | +40° 52' 3.92" |
| Apparent magnitude (V) | 8.10 |
| Distance | 133.8 ly (40.73 pc) |
| Spectral type | G5 V |
| Other designations | |
|
BD+41°1544, HIP 32916,
SAO 41390 |
|
HD 49674 is an 8th magnitude yellow dwarf star (spectral type G5 V) 133 light years from Earth in the constellation of Auriga. It has a very similar mass to our Sun. It is orbited by a recently discovered planet.
[edit] HD 49674 b
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor axis | (a) | 0.0580±0.0034 AU |
| Eccentricity | (e) | 0.087±0.095 |
| Orbital period | (P) | 4.94737±0.00098 d |
| Angular distance | (θ) | 1.425 mas |
| Longitude of periastron |
(ω) | 264° |
| Time of periastron | (T0) | 2,451,882.38±0.88 JD |
| Semi-amplitude | (K) | 13.7±0.21 m/s |
| Physical characteristics | ||
| Mass | (m) | >0.105±0.011 MJ |
| Discovery information | ||
| Discovery date | June 13, 2002 | |
| Discoverer(s) | Butler, Marcy, Vogt, et al. |
|
| Detection method | Radial velocity | |
| Discovery site | California | |
| Discovery status | Published | |
HD 49674 b is a planet discovered orbiting the star in 2002. At the time of discovery, it was the least massive extrasolar planet known, being less than half the mass of Saturn, but smaller planets were discovered in 2004. The planet is a gas giant and orbits extremely close to its star. Surface temperatures would be very high, and the planet probably has a faint red glow.
[edit] References
- Butler et al. (2003). "Seven New Keck Planets Orbiting G and K Dwarfs". The Astrophysical Journal 582 (1): 455 – 466. doi:.
- Butler et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646 (1): 505 – 522. doi:. (web Preprint)
[edit] External links
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