math_fact: 2859 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 2859 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: October 29th is the day in 1991 that the American Galileo spacecraft makes its closest approach to 951 Gaspra, becoming the first probe to visit an asteroid.