In the IAU100 NameExoWorlds campaign, which seeks to name systems formed by a single star and of which only one planet is known. It may be that the selected systems have more exoplanets orbiting or even have more companion stars, but so far they have not been discovered, exosystems were designated to different countries.

In the Henry Draper star catalog, the exosystem assigned to El Salvador has the designation, that is, technical name, HD 52265 or SAO 134031. In the year 2000 it was discovered that that star had a planet that orbits, the HD 52265b . This is located 98 light-years away from Earth, that is, 927 billion kilometers. From Earth we see this star SAO 134031, assigned to El Salvador, which is in the region of the constellation of Monoceros (the Unicorn), and from now on it has the official name of Citalá that means “river of stars”, while its planet Cayahuanca is now called “the stone that looks towards the stars”. Both names refer to geographical sites in the territory, with reference to the stars, and both terms have etymology of the Nahuat language. According to the IAU, both names correspond to the classification of “characteristic celestial and geographical terms in El Salvador from the Nahuat indigenous language”. This constellation can be seen from El Salvador between the months of December to March, from 8 at night to the south-east. To see the star it is necessary to use binoculars, about 10x50 are recommended.

The star SAO 134031 "Citalá" is a yellow dwarf of spectral type F and has between 1 and 1.4 times the mass of our star, the Sun, but is twice as luminous as it. Its surface temperature is estimated at 6,163 kelvin, a little hotter than the Sun, whose surface temperature is 5,768 kelvin. In terms of age, it is estimated that it is 2,600 million years old, while the Sun is around 5 billion years old.

The planet HD 52265 b “Cayahuanca” is a gas giant that takes only about 119 days to make a complete turn around its mother star. The planet's orbit has an eccentricity of 0.27, somewhat oval, while that of the Earth, which is almost circular, is 0.017. The Earth is 1 astronomical unit from the Sun, while this planet is 0.52 astronomical units from its star. This would be as if the Earth's orbit was between that of Mercury and that of Venus. Jupiter is the largest gaseous planet in the Solar System, its diameter being 12 times larger than Earth's. The diameter of the planet HD 52265b is 1.22 times larger than that of Jupiter. While Jupiter has 318 times the mass of the Earth, HD 52265b has 1.21 times the mass of Jupiter.