The Trans-atlantic Exoplanet Survey or TrES, uses three 4-inch (10 cm) telescopes located at Lowell Observatory, Palomar Observatory, and the Canary Islands to locate exoplanets. It was made using the network of small, relatively inexpensive telescopes designed to look specifically for planets orbiting bright stars using the transit method. The array uses 4-inch Schmidt telescopes having CCD cameras and automated search routines. The survey was created by David Charbonneau of the Center for Astrophysics, Timothy Brown of the National Center for Atmospheric Research, and Edward Dunham of Lowell Observatory. [1]
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Four planets have been discovered so far by the TrES project. All have been discovered using the transit method. Note that the discovery papers do not use the "b" suffix typically used in extrasolar planet designations. While forms with and without the b are used in the literature, the table here uses the designations assigned by the discoverers.
| Star | Constellation | Right ascension |
Declination | App. mag. |
Distance (ly) | Spectral type |
Planet | Mass (MJ) |
Radius (RJ) |
Orbital period (d) |
Semimajor axis (AU) |
Orbital eccentricity |
Inclination (°) |
Discovery year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GSC 02652-01324 | Lyra | 19h 04m 09s | +36° 37′ 57″ | 11.79 | 512 | K0V | TrES-1 | 0.61 | 1.081 | 3.030065 | 0.0393 | 0.135 | 88.2 | 2004 |
| GSC 03549-02811 | Draco | 19h 07m 14s | +49° 18′ 59″ | 11.41 | 750 ± 30 | G0V | TrES-2b | 1.199 | 1.272 | 2.47063 | 0.03556 | 0 | 83.62 | 2006 |
| GSC 03089-00929 | Hercules | 17h 52m 07s | +37° 32′ 46″ | 12.4 | 1300 | G | TrES-3 | 1.92 | 1.295 | 1.30619 | 0.0226 | ? | 82.15 | 2007 |
| GSC 02620-00648 | Hercules | 17h 53m 13s | +37° 12′ 42″ | 11.592 | 1400 | F8 | TrES-4 | 0.919 | 1.799 | 3.553945 | 0.05091 | 0 | 82.86 | 2007 |
TrES light curves of the Kepler field are available at the NASA Star and Exoplanet Database