I am grateful to Alex Pettit for helping me calculate the dimensions.
LRO-H2 Hydrogen Line Radio Telescope:

Measurements in cm:

Diameter 150.00
Depth 24.00
Focal Length 58.59
Radius Depth
x 0.00 y 0.00
x 5.00 y 0.11
x 10.00 y 0.43
x 15.00 y 0.96
x 20.00 y 1.71
x 25.00 y 2.67
x 30.00 y 3.84
x 35.00 y 5.23
x 40.00 y 6.83
x 45.00 y 8.64
x 50.00 y 10.67
x 55.00 y 12.91
x 60.00 y 15.36
x 65.00 y 18.03
x 70.00 y 20.91
x 75.00 y 24.00