47 Ursae Majoris (abbreviated 47 UMa), formally named Chalawan , is a yellow dwarf star approximately 46 light-years from Earth in the constellation of Ursa Major. , three extrasolar planets (designated 47 Ursae Majoris b, c and d; the first two later named Taphao Thong and Taphao Kaew) are believed to orbit the star. The star is located fairly close to the Solar System: according to astrometric measurements made by the Hipparcos astrometry satellite, it exhibits a parallax of 71.11 milliarcseconds, corresponding to a distance of 45.913 light-years. With an apparent magnitude of +5.03, it is visible to the naked eye and its absolute magnitude of +4.29 implies a visual luminosity around 60% greater than the Sun. A solar analog, with a spectral type of G1V, it has a similar mass to that of the Sun but is slightly hotter at around 5,882 K. and slightly more metal-rich with around 110% of the solar abundance of iron. Like the Sun, 47 Ursae Majoris is on the main sequence, converting hydrogen to helium in its core by nuclear fusion. Based on its chromospheric activity, the star may be around six billion years old, though evolutionary models suggest an older age of around 8.7 billion years. Other studies have yielded estimates of 4.4 and 7 billion years for the star. The low level of magnetic activity makes it a Maunder Minimum candidate star. Nomenclature 47 Ursae Majoris is the Flamsteed designation. On their discoveries the planets were successively designated 47 Ursae Majoris b, c and d. In July 2014 the International Astronomical Union launched NameExoWorlds, a process for giving proper names to certain exoplanets and their host stars. The process involved public nomination and voting for the new names. In December 2015, the IAU announced the winning names were Chalawan for this star and Taphao Thong and Taphao Kaew for two of the planets (b and c, respectively). The winning names were submitted by the Thai Astronomical Society, Thailand. Chalawan ( ) is a mythological crocodile king from the Thai folktale Krai Thong and Taphaothong and Taphaokaeo are two sisters associated with the tale. ('Chalawan' is also the name given to an extinct genus of crocodylian. It contains a single species, Chalawan thailandicus.) In 2016, the IAU organized a Working Group on Star Names (WGSN) to catalog and standardize proper names for stars. In its first bulletin of July 2016, the WGSN