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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.

Planets discovered

The XO telescope has discovered six objects so far, five 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.

See also

• List of extrasolar planets

A subset of XO light curves are available at the NASA Exoplanet Archive.

Other Ground Transit Surveys

• Next-Generation Transit Survey
• Trans-Atlantic Exoplanet Survey or TrES
• HATNet Project or HAT
• Kilodegree Extremely Little Telescope or KELT
• SuperWASP or WASP

References

1. McCullough, P. R.; et al. (2005). "The XO Project: Searching for Transiting Extrasolar Planet Candidates". Publications of the Astronomical Society of the Pacific. 117 (834): 783–795. arXiv:astro-ph/0505560. Bibcode:2005PASP..117..783M. doi:10.1086/432024. JSTOR 10.1086/432024.
2. McCullough, P. R.; et al. (2006). "A Transiting Planet of a Sun-like Star". The Astrophysical Journal. 648 (2): 1228–1238. arXiv:astro-ph/0605414. Bibcode:2006ApJ...648.1228M. doi:10.1086/505651.
3. Burke, Christopher J.; et al. (2007). "XO-2b: Transiting Hot Jupiter in a Metal-rich Common Proper Motion Binary". The Astrophysical Journal. 671 (2): 2115–2128. arXiv:0705.0003. Bibcode:2007ApJ...671.2115B. doi:10.1086/523087.
4. Johns-Krull, Christopher M.; et al. (2008). "XO-3b: A Massive Planet in an Eccentric Orbit Transiting an F5V Star". The Astrophysical Journal. 677 (1): 657–670. arXiv:0712.4283. Bibcode:2008ApJ...677..657J. doi:10.1086/528950.
5. McCullough, P. R.; et al. (2008). "XO-4b: An Extrasolar Planet Transiting an F5V Star". arXiv:0805.2921. Bibcode:2008arXiv0805.2921M. {{cite journal}}: Cite journal requires |journal= (help)
6. Burke, Christopher J.; et al. (2008). "XO-5b: A Transiting Jupiter-sized Planet with a 4 day Period". The Astrophysical Journal. 686 (2): 1331–1340. arXiv:0805.2399. Bibcode:2008ApJ...686.1331B. doi:10.1086/591497.
7. https://arxiv.org/abs/1612.02776 Discovery of XO-6b: a hot Jupiter transiting a fast rotating F5 star on an oblique orbit
8. "New Exoplanet-hunting Telescopes on Paranal". www.eso.org. European Southern Observatory. Retrieved 14 January 2015.

External links

• The XO Project website
• Astronomers Catch Planet By Unusual Means (SpaceDaily) May 19, 2006

v t e Exoplanet search projects
Exoplanetology Exoplanet
Ground-based	AAPS APF CORALIE EAPSNet ELODIE EPICS ESPRESSO FINDS Exo-Earths Geneva HARPS HARPS-N GPI HATNet HEK HiCIAO HIRES KELT LCES Magellan MARVELS MASCARA MEarth MicroFUN MINERVA Australis MOA N2K NGTS NESSI OGLE OPSP PlanetPol Project 1640 PARAS SEEDS SETI SOPHIE SPECULOOS SPHERE SuperWASP Systemic TrES XO Telescope ZIMPOL/CHEOPS
Space missions	Past MOST (2003–2019) SWEEPS using HST (2006) CoRoT (2006–2013) EPOXI using Deep Impact (2008–2013) Kepler (2009–2018) detected exoplanets ASTERIA (2017–2020) Current Gaia (2013–present) TESS (2018–present) CHEOPS (2019–present) Hayabusa2 (2021–present) James Webb Space Telescope (2021–present) Planned PLATO (2026) ARIEL (2029) Nancy Grace Roman Space Telescope (mid-2020s) Proposed EXCEDE HabEx LIFE LUVOIR Nautilus Deep Space Observatory New Worlds Mission OST PEGASE Cancelled Darwin EChO Eddington Space Interferometry Mission Terrestrial Planet Finder
Related	Detection methods Discoveries of exoplanets Habitable zone for complex life Lists of exoplanets nearest
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