MAVEN began its fifth “deep dip” campaign of the mission this week. Three maneuvers were successfully carried out to lower the periapsis (or lowest) altitude of the spacecraft by approximately 29 km, placing MAVEN into the targeted density corridor, where the average density of Mars’ atmosphere is 3.0 kg/km³.
The fifth deep dip for MAVEN is uniquely located over the solar terminator (the boundary between dayside and nightside), close to the ecliptic plane, and at a Martian latitude of 35ºN.
The three maneuvers — carried out on June 7 & 8 — required a total ∆V of 4.6 m/s and resulted in a periapsis altitude of ~119 km (74 miles). [More at link]