XO-1 is a magnitude 11 G-type main-sequence star located approximately 530 light-years away in the constellation Corona Borealis . XO-1 has a mass and radius similar to the Sun . In 2006 the extrasolar planet XO-1b was discovered orbiting XO-1 by the transit method using the XO Telescope .
5-879: The star XO-1 is named Moldoveanu . The name was selected in the NameExoWorlds campaign by Romania , during the 100th anniversary of the IAU . Moldoveanu is the highest peak in Romania. The XO Project is an international team of professional and amateur astronomers which discovered the Jupiter -sized planet orbiting around XO-1. The team, led by Peter R. McCullough of the Space Telescope Science Institute in Baltimore, includes four amateur astronomers from North America and Europe. The planet
10-459: The organization's hundredth anniversary, in a project officially called IAU100 NameExoWorlds, welcomed countries of the world to submit names for exoplanets and their host stars . A star with an exoplanet was assigned to each country, and members of the public submitted names for them. In August 2022, the third NameExoWorlds project was announced, which gave names to 20 exoplanets and their host stars, all of which are targets for observation by
15-437: The organization. The first such project (NameExoWorlds I), in 2015, regarded the naming of stars and exoplanets . 573,242 votes were submitted by members by the time the contest closed on October 31, 2015, and the names of 31 exoplanets and 14 stars were selected from these. Many of the names chosen were based on world history, mythology and literature. In June 2019, another such project (NameExoWorlds II), in celebration of
20-568: The presence of water vapor, methane , and carbon dioxide in the atmosphere of XO-1b. However an independent reinvestigation of the same data was unable to reproduce these results. NameExoWorlds NameExoWorlds (also known as IAU NameExoWorlds ) is the name of various projects managed by the International Astronomical Union (I.A.U.) to encourage names to be submitted for astronomical objects , which would later be considered for official adoption by
25-766: Was confirmed using the Harlan J. Smith Telescope and Hobby-Eberly Telescope at McDonald Observatory of the University of Texas . An independent confirmation of the planet was made by the Wide Angle Search for Planets project. In 2019, the planet was named Negoiu , after Negoiu Peak in Romania . Further observations with the NICMOS instrument on board the Hubble Space Telescope detected
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