Trans-Atlantic Exoplanet Survey

"TrES" redirects here. For other uses, see tres (disambiguation).

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]

The TrES survey is no longer operational.

Planets discovered

Five 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.

Light green rows indicate that the planet orbits one of the stars in a binary star system.

Star Constellation Right
Declination App.
Distance (ly) Spectral
Planet Mass


GSC 02652-01324[1] Lyra 19h 04m 09s +36° 37 57 11.79 512 K0V TrES-1b 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
GSC 03949-00967[2] Cygnus 20h 20m 53s +59° 26 56 13.718 1170 G TrES-5 1.778 1.209 1.4822446 0.02446 ? 84.529 2011

See also

TrES light curves of the Kepler field are available at the NASA Exoplanet Archive

Similar exoplanet discovery projects

Exoplanet hunting spacecraft


  1. 1 2 Alonso, Roi; et al. (2004). "TrES-1: The Transiting Planet of a Bright K0V Star". The Astrophysical Journal Letters. 613 (2): L153–L156. arXiv:astro-ph/0408421Freely accessible. Bibcode:2004ApJ...613L.153A. doi:10.1086/425256.
  2. Mandushev, Georgi; et al. (2011). "TrES-5: A Massive Jupiter-sized Planet Transiting A Cool G-dwarf". The Astrophysical Journal. 741 (2): 114. arXiv:1108.3572Freely accessible. Bibcode:2011ApJ...741..114M. doi:10.1088/0004-637X/741/2/114.

External links

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