Overview
- The event occurs because the full moon coincides with lunar perigee, and NASA lists three supermoons this year on October 7, November 5, and December 4.
- Visibility is broadly favorable across Brazil but depends on cloud cover, with Paraná’s meteorological service saying chances are high in the north, northwest, west, southwest, central and south, and low along the coast and Greater Curitiba.
- Observers may perceive the disk up to roughly 10–14% larger and about 30% brighter than an average full moon.
- Best viewing is near moonrise in the east after sunset from dark, unobstructed spots, with binoculars or small telescopes revealing surface detail; moonrise is about 6:43 p.m. in São Paulo and 6:27 p.m. in Rio.
- Brazil’s Observatório Nacional notes that “supermoon” is a popular label coined by astrologer Richard Nolle rather than a formal scientific term.