OGLE-TR-56
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Star OGLE-TR-56 |
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| AladinLite | |||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | Sagittarius | ||
| Right ascension | 17 h 56 m 35 s | ||
| declination | -29 ° 32 ′ 21 ″ | ||
| Apparent brightness | 16.6 mag | ||
| Typing | |||
| Known exoplanets | 1 | ||
| Spectral class | G | ||
| Variable star type | Coverage variable | ||
| Astrometry | |||
| distance | ~ 4900 ly ~ 1500 pc |
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| Physical Properties | |||
| Dimensions | (1.17 ± 0.04) M ☉ | ||
| radius | (1.32 ± 0.06) R ☉ | ||
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Other names and catalog entries |
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OGLE-TR-56 , also known as V5157 Sagittarii is a solar system at a distance of about 1,500 parsecs in the constellation Sagittarius . At least one exoplanet moves around the central star .
Central star
OGLE-TR-56 is a star of the spectral class G, that is, it is a star that is quite similar to our sun. Due to the great distance, its apparent magnitude is only 16.6 mag.
Exoplanet
The discovery of the exoplanet OGLE-TR-56 b took place in 2002 by the Polish OGLE team using the transit method . The change in the star's luminosity is measured when the planet passes in front of the star (transit). OGLE-TR-56 b orbits its central star in just 1 day and 5 hours, and its distance from the central star is 0.02 AU (3.4 million km). Accordingly, OGLE-TR-56 b is likely to be the hottest of all known planets; its temperature is estimated at 5900 K and would be even higher than the surface temperature of our sun (5778 K). The planet has a mass of around 1.3 Jupiter and is classified as Hot Jupiter . At around 200 km / s, its orbital speed is more than four times as high as that of Mercury .
Web links
- obswww.unige.ch with light curves
- The exoplanet in the "Encyclopedia of Extrasolar Planets"
- Abstract of the OGLE team from 2002