Last year during the “Name an ExoWorld” International Campaign the International Astronomical Union accepted the names “Moldoveanu” and “Negoiu” for the star XO-1 and its exoplanet XO-1b in the Northern Crown constellation. These two names represent the names of highest peaks (2500 m) here in Romania.
On July 4, 2020, I observed the transit of the XO-1b exoplanet. This extrasolar planet is 536 light-years away and is a Hot Jupiter type that revolves around the host star in just 3.9 days at a distance of about 7 million kilometers. I observed the host star for almost 3 hours and I measured the duration of the transit at 165 minutes, the observational report being sent to the Exoplanet Transit Database.
Details about the host star and exoplanet can be found at this link:
A simulation of this system can be seen here (click and drag on image):