HAT-P-5
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| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Lyra |
| Right ascension | 18h 17m 37.299s |
| Declination | +36° 37′ 16.88″ |
| Apparent magnitude (V) | +11.95 |
| Astrometry | |
| Proper motion (μ) | RA: 2.6 mas/yr Dec.: -2.5 mas/yr |
| Distance | approx. 1,100 ly (340 ± 30 pc) |
| Details | |
| Mass | 1.16 ± 0.062 M☉ |
| Radius | 1.167 ± 0.049 R☉ |
| Temperature | 5960 ± 100 K |
| Metallicity | 0.24 ± 0.15 |
| Age | 2.6 ± 1.8 Giga years |
| Other designations | |
HAT-P-5 is a 12th magnitude star in the constellation Lyra, approximately 1,100 light years away from Earth. It is a spectral type G star, only about 0.16 solar masses and radii greater than our Sun, and only 200 kelvins hotter. It is estimated to be 2.6 billion years old. [1][2]
[edit] Planetary system
On October 9, 2007, a report was submitted to The Astrophysical Journal Letters telling of the discovery of an exoplanet transiting HAT-P-5. The planet was described as a Jupiter-like hot Jupiter, with a radius about one and one quarter times that of Jupiter, and nearly the same mass. Its density was reported as 0.66 ± 0.11 g/cm3, and its inclination 86.75 ± 0.44°.[3]
| Companion (in order from star) |
Mass (MJ) |
Orbital period (days) |
Semimajor axis (AU) |
Eccentricity |
|---|---|---|---|---|
| b | 1.06 ± 0.11 | 2.788491 ± 2.5e-05 | 0.04075 ± 0.00076 | 0 |
[edit] References
- ^ a b Notes for Planet HAT-P-5 b. Extrasolar Planets Encyclopaedia. Retrieved on October 16, 2007.
- ^ a b Simbad Query Result. Simbad. Retrieved on October 16, 2007.
- ^ HAT-P-5b: A Jupiter-like hot Jupiter Transiting a Bright Star. fr.arxiv.org. Retrieved on October 16, 2007.
[edit] External links
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