This
table gives compass settings, in millimeters, for laying out points on spheres
of specified diameter. For example to
lay out four equidistant points on a sphere of 50mm, set the compass to 41mm. To lay out the six main points on that
sphere, set the compass to 35.5mm.
|
Sphere Diameter |
Top And Bottom |
4 Equidistant Points |
6 Points |
8 Clearance Points |
8 Equidistant Points |
12 Primary Points |
20 Constellation Points |
|
48 (1 7/8”) |
34 |
39 |
34 |
34 and 18 |
22 |
25 |
15 |
|
50 (2”) |
35.5 |
41 |
35.5 |
35.5 and 19 |
23 |
26 |
16 |
|
62 (2 1/2”) |
44 |
50.5 |
44 |
44 and 24 |
28.5 |
32.5 |
20 |
|
73 (2 7/8”) |
52 |
59.5 |
52 |
52 and 28 |
33.5 |
38 |
23.5 |
|
90 (3 1/2”) |
64 |
73.5 |
64 |
64 and 34 |
41 |
47 |
29 |
|
98 (3 7/8”) |
70 |
90 |
70 |
70 and 38 |
45 |
52 |
31 |
|
114 (4 1/2”) |
80.5 |
93 |
80.5 |
80.5 and 43.5 |
52 |
60 |
36.5 |
|
124 (4 7/8”) |
87.5 |
101 |
87.5 |
87.5 and 47.5 |
57 |
65 |
40 |
|
140 (5 1/2”) |
99 |
114 |
99 |
99 and 53.5 |
64 |
73.5 |
45 |
|
150 (5 7/8”) |
106 |
122.5 |
106 |
106 and 57.5 |
69 |
79 |
48 |
|
165 (6 1/2”) |
116.5 |
134.5 |
116.5 |
116.5 and 63 |
76 |
86.5 |
53 |
|
175 (6 7/8”) |
123.5 |
143 |
123.5 |
123.5 and 67 |
80 |
92 |
56 |
|
190 (7 1/2”) |
134 |
155 |
134 |
134 and 72.5 |
87 |
100 |
61 |
|
200 (7 7/8”) |
141.5 |
163 |
141.5 |
141.5 and 76.5 |
92 |
105 |
64 |
Measurements
are in millimeters.