Crux few bright stars of importance lie between Crux and the pole itself, although the constellation Musca is fairly easily recognised immediately beneath Crux. A technique used in the field is to clench one's right fist and to view the cross, aligning the first knuckle with the axis of the cross. The tip of the thumb will indicate south. Argentine gauchos are well known for using it for night orientation in the vast Pampas and Patagonic regions. Within the constellation's borders, there are 49 stars brighter than or equal to apparent magnitude 6.5. The four main stars that form the asterism
Flag of Brazil the fourth magnitude, and a tenth of a module (0.10m) for the fifth magnitude. Paulo Araújo Duarte of the Federal University of Santa Catarina claims that "the creators of our republican flag intended to represent the stars in the sky at Rio de Janeiro at 8:30 in the morning on 15 November 1889, the moment at which the constellation of the Southern Cross was on the meridian of Rio de Janeiro and the longer arm [of the cross] was vertical". Another article, citing "O Céu da Bandeira (The Sky of the Flag)", by J. R. V. Costa, says the exact