Info

i.d., ,J b2

a2

i-S-

eccentricity,»

• -0

• - V«2 -b2A 0< • < 1

• •1

• »>1

perifocal distance. q

q-a

q - a 11 -«)

Q-q

q- •!»—U

vcuocrrv, v. at distance FROM focus, r

V2-»/«

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