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Mission Milestones
August 7, 1999At 1:43 a.m. EDT August 7, 1999 Chandra's engines were ignited for the fifth time to place it in its planned operating orbit. The seven-minute, 44-second firing of the observatory's Integral Propulsion System raised Chandra's perigee to an estimated 6,012 miles (9,676kilometers), leaving its apogee, or high point, essentially unchanged at 86,458 miles (139,141 kilometers). |
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