Doctari Alpha was the site of a Human-Vulcan research facility that was destroyed by a Klingon "terror raid" sometime during the first half of the 23rd century. The attack coincided with a nearby supernova.
Michael Burnham's parents were killed during the attack on Doctari Alpha. Three days before the attack, they had prepared to take Michael to Mars for a vacation, but Michael had asked to stay and witness the supernova, so the family remained at the outpost. When the attack took place, her parents hid her in a cabinet before Klingons could storm their residence. They entered the dwelling despite her father's effort to barricade the door, and killed him almost immediately, but fought with her mother before killing her. They then sat down to the family's table and ate their dinner. (DIS: "The Vulcan Hello", "Lethe", "Will You Take My Hand?")