The XO Telescope is an astronomical telescope located on the 3,054 m (10,000 foot) summit of Haleakala on Maui, Hawaii. It consists of two 200-millimeter telephoto camera lenses, and resembles binoculars in shape. 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]
The XO telescope has discovered six objects so far, five are hot Jupiter planets and one, XO-3b, may be 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 |
XO-6[7] | Camelopardalis | 6h 19m 10.31s | +73° 49′ 39.24″ | 10.28 | 760 | F5V | XO-6b | 4.4 | 2.07 | 3.76 | 0.082 | 0 | 86.0 | 2016 |
XO-7 | Draco | 18h 29m 52.30s | 85° 13′ 59.58″ | 10.52 | 763 | G0V | XO-7b | 0.71 | 1.373 | 2.8641424 | 0.04421 | 0.038 | 83.45 | 2019 |
A subset of XO light curves are available at the NASA Exoplanet Archive.
| |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
| |||||||||||
Ground-based |
| ||||||||||
Space missions |
| ||||||||||
Related |
| ||||||||||
|
![]() | This article about a specific observatory, telescope or astronomical instrument is a stub. You can help Wikipedia by expanding it. |