user: Question: What is the lowest Perigee with a Launch date of 1970-08-26?
Columns: ['Name', 'Alt name', 'Launch date', 'Mass (kg)', 'Decay date', 'Perigee (km)', 'Apogee (km)', 'Inclination']
Types: ['text', 'text', 'text', 'real', 'text', 'real', 'real', 'real']
Sample row: ['SAMOS F2-1', '1962 Delta 1', '1962-02-21', 1000.0, '1962-03-09', 169.0, 220.0, 81.9]
SQL:

assistant: SELECT MIN("Perigee (km)") FROM "Table" WHERE "Launch date" = '1970-08-26';