XO Telescope
The XO Telescope is a telescope located on the 3,054 m summit of Haleakala on Maui, Hawaii, formed by a pair of 200 mm telephoto lenses. It is used by the XO Project to detect extrasolar planets using the transit method. It is similar to the TrES survey telescope. The construction of the one-of-a-kind telescope cost $60,000 for the hardware, and much more than that for the associated software.[1]
Contents
Planets discovered
The XO telescope has discovered five objects so far, four are hot Jupiter planets and one, XO-3b, is probably a brown dwarf. All were discovered using the transit method.
Light green rows indicate that the planet orbits one of the stars in a binary star system.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| XO-1[2] | Corona Borealis | 16h 02m 12s | +28° 10′ 11″ | 11.319 | 600 | G1V | XO-1b | 0.9 | 1.3 | 3.941534 | 0.0488 | 0 | 87.7 | 2006 |
| XO-2N[3] | Lynx | 07h 48m 07s | +50° 13′ 33″ | 11.25 | 486 | K0V | XO-2Nb | 0.57 | 0.973 | 2.615838 | 0.0369 | 0 | 88.58 | 2007 |
| XO-3[4] | Camelopardalis | 04h 21m 53s | +57° 49′ 01″ | 9.91 | 850 | F5V | XO-3b | 11.79 | 1.217 | 3.1915239 | 0.0454 | 0.26 | 84.2 | 2007 |
| XO-4[5] | Lynx | 07h 21m 33.1657s | +58° 16′ 05.005″ | 10.78 | 956 | F5V | XO-4b | 1.72 | 1.34 | 4.12502 | 0.0555 | 0.0024 | 88.7 | 2008 |
| XO-5[6] | Lynx | 07h 46m 51.959s | +39° 05′ 40.47″ | 12.1 | 881 | G8V | XO-5b | 1.15 | 1.15 | 4.187732 | 0.0508 | 0.0029 | 86.8 | 2008 |
See also
A subset of XO light curves are available at the NASA Exoplanet Archive.
Other Ground Transit Surveys
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- Next-Generation Transit Survey
- Trans-Atlantic Exoplanet Survey or TrES
- HATNet Project or HAT
- Kilodegree Extremely Little Telescope or KELT
- SuperWASP or WASP
References
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- The XO Project website
- Astronomers Catch Planet By Unusual Means (SpaceDaily) May 19, 2006
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