On 11th November, 1572, Tycho noticed an unfamiliar bright star in the constellation of Cassiopeia, and continued to observe it with a sextant. It was a very brilliant object, equal to Venus at its brightest for the rest of November, not falling below the first magnitude for another four months, and remaining visible for more than a year afterwards.
https://www.reddit.com/r/Damnthatsinteresting/comments/1iq2mkj/theodore_roosevelts_diary_entry_for_valentines/