Extrasolar planet List of extrasolar planets
Size comparison of TrES-3 with Jupiter.
Parent star

<tr> <td colspan="2">Star</td> <td>GSC 03089-00929</td></tr><tr> <td colspan="2">Constellation</td> <td>Hercules</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>17h 52m 07s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>+37° 32′ 46″</td></tr><tr><td colspan="2">Distance</td><td>1300 ± 600 ly
(400 ± 200 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>0.0226 ± 0.0013 AU</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>1.30619 ± 0.00005 d</td></tr><tr> <td>Inclination</td> <td style="text-align: center">(i)</td> <td>82.15°</td></tr>

Physical characteristics

<tr><td>Mass</td><td style="text-align: center">(m)</td><td>1.92 ± 0.23 MJ</td></tr><tr><td>Radius</td><td style="text-align: center">(r)</td><td>1.341 ± 0.081 Template:Jupiter radius</td></tr><tr><td>Density</td><td style="text-align: center">(ρ)</td><td>1172 kg m-3</td></tr><tr><td>Surface gravity</td><td style="text-align: center">(g)</td><td>2.7 g</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>2007</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>O'Donovan et al.</td></tr><tr> <td colspan="2">Discovery method</td> <td>Transit</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published</td></tr>

Other designations

<tr style="background-color: #A0B0FF;"><td align=center colspan=3>Database references</td></tr><tr valign=baseline><td colspan=2>Extrasolar Planets
</td><td>data</td></tr><tr><td colspan=2>SIMBAD</td><td>data</td></tr>

TrES-3b is an extrasolar planet orbiting the star GSC 03089-00929. It has an orbital period of just 31 hours and is undergoing orbital decay due to tidal effects. It has nearly twice the mass of Jupiter.

File:TrES-3 b rv.pdf

It is the third transiting planet found by the Trans-Atlantic Exoplanet Survey. It was discovered in the constellation Hercules about 10 degrees west of Vega, the brightest star in the summer skies. Its mass was confirmed via radial velocity measurements of the host star, which showed the presence of a planet mass companion with the same period as the transits. The planet's home star is slightly smaller and cooler than the Sun. The orbital period is less than one and a third days, one of the shortest known.[1]

See alsoEdit


  1. O'Donovan, Francis T. (2007). TrES-3: A Nearby, Massive, Transiting Hot Jupiter in a 31-Hour Orbit. Astrophysical Journal Letters 663: L37.

External linksEdit


Coordinates: Sky map 17h 52m 07s, +37° 32′ 46″

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