Historical clue formulations

• Star in Virgo — 2013-11-23
• Virgo's brightest star — 2010-06-05
• Virgo's alpha star — 2009-03-13
• Star in Virgo — 2003-08-19
• First-magnitude star in Virgo — 1998-12-05
• Star in Virgo — 1994-08-10
• Bright star in Virgo — 1994-05-18