a = 4.61 kpc (4000 < a < 7000) pc
b = 0.40 kpc (200 < b < 400) pc
Md = 9.35 × 1010 M (5.8 × 1010 < Md < 1.4 × 1011) M
c = 0.32 kpc (300 < c < 800) pc
Mb = 2.02 × 1010 M (3 × 109 < Mb < 4.6 × 1010) M
v0 = 190 km s−1 (100 < v0 < 250) km s−1
d = 14 kpc (5000 < d < 15 000) pc

Flying Saucers Have Landed